What irks me is the tobacco line. I don't know if they did this at other stores, but at mine we have to take any size order because people with large orders who wanted to buy tobacco products had to wait in two lines.
However now we get people with huge carts who have no idea that the register they are monopolizing (which is not equipped to handle large orders) is the only place in the store which other people can buy cigarettes!
Also, I hate when customers attempt to justify their behavior with lines like, "you look bored," "no one else is here," and "I only have a little over twenty items."
All I want to say is, "You and I both know that you're breaking the rules, so just shut up and do it. Don't try to make me think that I should be grateful to you for being an asshole. I'm not bored. By the time you get halfway done with your order, there WILL be a line. By the way, twenty items means twenty items and no more."