Does anything like an IR "fence" exist?

200 watt heat lamps will absolutely blast those cameras. I tried that for my own cameras once, could barely see any foreground but I could easily see everything 100 yards away

You found your billion dollar idea. But in all seriousness I would 1) get it in writing that’s the specific reason for the camera is to invade your privacy. 2) even if it’s not illegal per say create a paper trail with complaints to the relevant authorities. 3) get a laser and position it to block out the footage. When he moves the camera, reposition the laser. You have just as much right to privacy as he does to having a camera on his property.

If his camera is there specifically to watch you, that borders on stalking or something. The problem is proving it. He can always say your yard is an incidental capture and deny he said otherwise.

Camera laws are different in different states but many say that it’s legal to point them anywhere there’s no reasonable expectation of privacy. So if I have a camera watching the front walk outside my house and it also captures the front yard and front door of the house across the street, that’s perfectly legal because there’s no expectation of privacy in that area. If I position one outside someone’s bedroom window, that’s not just creepy, it’s also illegal. Hope that helps.

IR floodlight

If I understand what you are asking about, this is referred to as an "image curtain" in cyberpunk stories such as "Ghost in the Shell". I do not believe that these exist in any practical way.

Anything to wash-out his camera may or may not work and you wouldn't be able to tell (and importantly trust) if it does. IR lights can wash out IR cameras, but regular lights would be needed to wash out non-IR cameras/modes. And they would need to be very bright, which is a cost burden on you in terms of equipment as well as energy consumption.

Speaking in generalized terms of what is permissible here in the US: People can set up cameras to watch anything that they want that is within their line of sight. Just as you can go around and take photos of anything that you want that you can readily see via a similar LOS from your own private property as well as public property. You cant stop someone from sitting on their own property looking at you with binoculars or even taking photos or video of you.

What you can do should be defensive in nature: Fences, shrubbery/trees, curtains, lights, etc. What you should not do is anything offensive, such as anything that has the intent of striking out at the neighbor (lights focused only at your neighbors property, lasers, etc). If/when this involves the local authorities/court, you will be in the position of an aggressor or even culpable to committing acts that violate local ordinances or laws. It's a slippery slope. Pointing a laser at someone can be seen as assault, as lasers can literally blind people as well as do other forms of damage. They have the right to set up cameras. You do not have the right to damage them.

A relative of mine had a nosey neighbor that would literally sit in their window with binoculars. So my relative planted trees that obstructed view to the front door as well as a front-facing window. This totally cheesed-off the nosey neighbor and got them to stop, because there was nothing to see anymore.

If you made an actual fence out of IR light sources, that would certainly block their camera at night, if it wasn't a colour night vision camera.

Otherwise no, there's nothing you can like shine onto your property to prevent it from being seen.

Aren't there things you can get that mess with cameras that you can just point at it? I've even heard of high powered lasers burning out phone cameras sensors but I'm not suggesting vandalism; that might get you in trouble.

This is why i feel houses should have gated and fenced front yard/driveway area also.

I suppose you could build a wall of IR floodlamps, but a single light here or there isn't going to do much. I have conduit run in my front and rear yards and have cameras pointing back at the house, and neither the IR lights in the cameras nor the flood lights on the buildings facing other cameras wash each other out. The effect is more pronounced when they are pointing almost directly at each other, but it's still minor.

You could try setting up a series of strategically placed IR lights to create a sort of barrier that washes out the footage when it crosses your property line. It's a creative idea to maintain your privacy without causing any harm.

Perfectly legitimate to position a flood light that illuminates your yard and coincidentally dazzles his camera at night. If the it’s a continuous recorder, that’s probably enough; if it’s a motion detector, a windmill ornament would provide hours of boring footage.

Maybe an IR laser?

Point a laser at the camera. It won't be able to see shit.

Yes, Optex makes sensors which can do this.

https://www.optexamerica.com/products/intrusion-detection/outdoor#filter=*

But by law he has to reposition his cameras as it is an Invision of privacy OR have a privacy filter active (this blacks out a user defined area). Call the police, file a grievance and mention what he said.

It is illegal for someone to position their cameras to view your windows or entrances, driveways are a grey area I think. I know this because this is something which has come up more than once in the 28 years I've been installing CCTV.

You have no privacy in public. So he can point a cam at your driveway, and you can't do anything. If you point a laser at it, you're on the hook for all damages and will have a direct laser line back to you on his dvr to show the police. Your on cam evey single day all day long. Your cell phone, the ATM, the bank, some new cars, new tvs, new refrigerators, your pc/laptop, all and any stores you're in ,the traffic cams, highway cams. You are on cam 75 to 85% of the day, and people need to remember this. The ONLY privacy you have is behind your walls. If you don't have a wall going all the way around your home, you don't have privacy.

there's MILLIONS upon MILLIONS of front door Ring type cameras capturing the neighbor's house across the street >>> why is ONE of the neighbor's security system cameras bothering you soooooo fricking much?

be willing to bet that there's a camera on the opposite side of his home watching that direction - watching those neighbor's front yard >>> How about that truth?

if you got that much secret crap going down in the front yard >>> think about moving and taking allllll those secrets with you