It is also a form of griefing, and is looked down upon by those who play the game normally.
But let's focus on the FPS aspect of teamkilling.
We, the Teamkillers, the few, the proud. The more experienced of us have refined it into an art (LOLMAN, for example). We know the game inside and out, and have played our FPS's for unhealthy lengths of time, in many cases.
Teamkilling in a straight Team Deathmatch is not nearly as satisfying as teamkilling in a more goal oriented mode of play, like S&D (not unlike counterstrike). There, once killed, your teammates do not respawn until the round is over, which can be up to 5 mins! Imagine the frustration as you are team killed as the round starts, you plot and fry in your own juicies all throughout the round, and, as the next one starts, you are teamkilled instantly by the same person. I tell you, it's a feeling not unlike having your testes ripped out by pack of dogs. And it brings joy to our hearts to bring that feeling to you, the average game playing noob.
As a teamkiller, the most frequently asked question I get is: "Are you gay?"
The answer to that may never be known, my friends, but that is not the most important question.
The second most asked question i get is, simply, "Were you abused as a child?"
No, i keed, i keed.
The second most asked question i get is,"Why?"
And therein lies the secret of teamkilling. To "why," I always answer "For fun." This pisses them off, but it's the truth. Sometimes the truth hurts. Especially 30 7.9mm rounds of truth entering your buttocks at point blank range. That really hurts.
And the essence of teamkilling is FUN, fun at the average luser n00b's expense. Hell, when you get all pissed off, that just adds fuel to the fire of laughter and joy in our teamkillin' hearts.
So keep calling me a whore, cunt, etc, it only makes it funnier
FIGHT THE POWER!!!!!!!!!
Your Best Friend,