People who sit on the stairs at if you ask them to move because you have a class upstairs they act like you are an inconvenience to them.

When people bring up a topic that you don't want to talk about so much, and when you do say something about it; even if it is just agreeing with what they said - they exaggerate it and "pass it on".

Gossip.

People who are under the impression common ideas such as a colour, a certain brand and things like that belong specifically to them. And they hold a grudge against people of the same little community who have the same interest as them.