There is a very large communal changing room in the gym where I go to swim a couple of times a week. There is rarely more than about 10 people in in at any one time so loads of room for people to spread out and get changed in a bit of privacy. However someone will invariably ignore all the empty space and plonk themselves at a locker a few inches away from yours while you're trying to discreetly put your knickers on under a towel; or even more annoying will sit on the bench right beside you and start texting.
AIBU to think that if a changing room is three quarters empty it is rude and ignorant and a bit strange to sit practically on top of someone else?