I know it says what one thing, but.....
1) Holding a door open for someone, they go through and don't say thank you.
2) Standing in a bus queue and people coming along and just getting in, ahead of those who have been waiting (pensioners are worse for that)
3) Cyclists who don't think traffic lights apply to them.
4) People who don't make their children wear seat belts or sit them in a child seat, but allow them to prance around the vehicle, whilst they, the parents sit in the front belted up.
I could go on and on and on.