1. Teammates who manage to kill you with friendly fire disabled by turning a jeep on you and jumping out of it before it hits you.
2. People who join Rush or Conquest and never do objectives, including 5-6 snipers sitting at spawn. When I see that I usually fuck them up using the method described in #1.
3. Motherfucking dudes with 100 levels that only fly jets, they mastered it to the point where you die no matter what when you get into a jet, and they are just like snipers at spawn described in #2, never do objectives, just fly around looking for jets to take out.

These 3 types of retards are the reason why I stopped playing this game, hopefully it will be more balanced in BF4.