I live in a safe area (not in the US), I know most of my neighbours at least somewhat but I wouldn’t ever confront them directly because I don’t know who’s on the other side of the door and how they deal with confrontation. It only takes one asshole to put me in the hospital because I dared tell them they were being too loud, even if 99% of my neighbours are sweet and caring.

*badly

I’m pretty sure they don’t mean “give up on time zones” but “express your timezone in UTC”. For example, central Europe is UTC+1. Makes almost no difference in everyday life, only when you tell someone in another zone your time. The idea is to have one common reference point and do the calculation immediately when someone gives you their UTC zone. For example, if you use pacific time and tell me that, it means nothing to me, but if you say “UTC-8” I know exactly what time it is for you.