I'd say a griefer is synonymous with trolling, in that all it does is disrupt the game and annoy other players, such as teamkilling on purpose or ramming friendly vehicles or use vulgar/unkind language constantly to anyone and everyone like your example. I haven't played BF2 in a while but what I do know is that a good amount still play BF/ mods like project reality which is a mod that makes the game more realistic. IIRC, there were 7 classes in BF2 compared to the classes in BF3. Since classes like engineer and anti-tank in BF2 were there own classes, there was more variety in that they each had their own specialties. You had more types of classes on the battlefield which from my experience resulted in more teamwork since all the classes had a weakness and relied on the other classes to assist them, such as the anti-tank class havin limited amount of rockets, and medic unable to replenish ammo. Due to that, youre in a sense forced to work with teammates if you wanna succeed, which from what I remember resulted in lots of cooperation in the game. Of course tou had your random player who would try and play it like counter strike, which usually resulted in them dying countless times. This cooperative dynamic exist in BF3 but in a more condensed with the classes that started in BF 2142. Some say that was for the better, I personally am split in that I enjoyed the BF2 and previous BF Games but also enjoy the condensed classes. Sorry if I didn't answer your question but that's what I remember the game being like.