Apart from the obvious things like murderers, paedophiles, idiots and numerous others:
Chavs – people who dress in Burberry branded clothes with gold chains and such. If you live in the UK, you know the type I mean. For others, Google is your friend.
People who have to be told more than three times.
Children who always seem to look at where they have been rather than where they are going.
Adults who still haven’t learned how to cross a road correctly (Stop, Look, Listen).
Those people (friends, relatives, kids) that have their head constantly buried in their phone.
People who queue for the bus complaining that it’s late, then get on and fish around in their pockets for change instead of having it ready.