AIBU to think its just wrong to push past/run ahead of someone with your trolley to get into the lift before them when they have been waiting for 5 mins more than you?
AIBU to think if there's no room in the lift you shouldn't try and force yourself in making the already confined space even more hot sweaty and uncomfortable.
and finally
AIBU to think you don't unpack someones shopping from their trolley back on to the shelves when they have their back turned and try and dump your six fucking loaves of bread in, then when they turn around say
"well you haven't got much have you" 