It really depends. Like if they're old, have a baby stroller, are carrying a lot of things, are parents with little kids, and other circumstances like that I don't really have a problem at all with it. The only time it bugs me is when they're alone or with like one other person and are just doing something like excising where they could easily move.
When you have to do work but they people next to you seem to be talking as loud as humanly possible about the stupidest stuff ever?
Cell phone talkin when I'm at work tryin to take their order. Yes. And it's rude get off your phone. Texting and driving isn't a peeve, it's playin with your life.
People who watch/listen to stuff in their phone and don't use earbuds.