I think they can negotiate down the in-house repercussions by replacing some of that time with some other consequence. Like volunteering outside or doing chores for the girl or something. If you think you genuinely need to reduce the amount of time, then you can do so, but also don’t fold under the pressure of others telling you it’s too long if you really think it’s appropriate. I wouldn’t tolerate “pranking” like that of any kind. Pranking is like putting a fake spider toy on the toilet or something.