Several years ago, I forced the HOA/management company to install a railing in the common stairwell up to our second floor unit. The mgmt rep talked about contacting their lawyer, so I did my research and quoted from the text of the Fair Housing Act that I believe it was a "reasonable modification" and that I hoped lawyers would not be necessary. Their eventual approval referenced covering the cost of removal should we move out. I didn't bring it up at the time, but the FHA also says

In general, if the modifications do not affect the housing provider’s or subsequent tenant’s use or enjoyment of the premises, the tenant cannot be required to restore the modifications to their prior state.

I can't wait until they come after me for the cost of removal and I can tell them to pound sand. They can take it out of the $150 "move out fee."

I'll also be on the lookout for any other way I can screw with them on the way out.

Edit because people stop reading after the post:

I forgot to include it was a second railing on the stairwell and it is for medical reasons.