| Overhead lights that switch off after a certain time if no motion is detected. I have even had this happen to me in the toilets :-) Ah, so you're the guy on his phone in the toilet, occupying a stall for way longer than necessary, while others have to wait. Thanks, buddy.
I think it's probably an ADA violation, because it must cause completely unnecessary problems for people with mobility issues (not everyone can easily wave their arms around over their head while using the restroom).
Edit: I actually know nothing about the legal nuances of the ADA, but it certainly seems to violate the generally understood spirit of the law.