Only been to NYC 2 times but all that just screams common sense to me.

I can't believe how much is still unchanged (e.g. subway and sidewalk etiquette, bodegas, refusal of radiators to adjust heat output)) in the past 25 years since I lived in NYC. So I snorted. Favorite was the leprechaun on the subway.

I grew up there but haven't visited for any length of time since around 2000, and the only thing that's different is cell phone reception (none at all then.)

Most of these hold true for London. For the subway pole hogger, I always say "Excuse me, I need to hold onto that because I can't reach the overhead rail" (I'm 4ft 11in). It always works, because the hogger would look like a total douche/bitch if they refuse to move and leave me with nothing to hold onto on a moving train.