Since I just got back, I have a ton of pet peeves!!
1. People who crowd you in line, thinking that they can magically make the hundreds of people in front of them move faster.
2. On the flip side, people who refuse to keep up with the line, and as a result there's a space of about 50 feet between the group in front of you and the people in front of them.
3. Kids who think any sort of chain or bar is a play thing. They climb all over it, kicking you in the process. Their parents totally ignore them, moving on with the line. If you DARE to move ahead with the line, leaving their kids in the dust, the parents look at you like you're a potential kidnapper
4. Large groups who send one member running ahead to get in line, and then one by one the rest of the group pushes their way through the line to catch up.
5. Little kids who fight with each other in line, kicking and hitting each other and all the people around them while their parents act like they are somebody else's children.