Guess we can all relate to these happenings. My worst peeve are the people who get in the express lane but have a huge load in their basket. Hubby complained to the girl once and she told him management did not allow them to stand empty even for a few seconds...doesn't sound fair to me when just a few seconds elapse before someone comes in with only the 8 items allowed.
And the chatters blocking the ailses , staring at you as if you are the intruder makes me want to scream...I usually just turn around and go around another aisle after saying excuse me a few times with no action on their part.