MrHero17 said:
Well in LoL and other Mobas whoever gets the kill gets more gold so obvious your Ad is going to be annoyed if the support has 5 kills while he has 5 assist. Better that someone get the kill than no one though.
That's partially true... there are circumstances where it's better to give the kill to the support, as usually the support is behind everyone else, which means they'll gain more of a benefit if they got the kill.
Also, supports can use kills just as well as the damage dealers. Support items are awesomely useful.
OT: I honestly don't care about kill steals, I don't play Call of Duty however if a team mate KS's me in League of Legends or DotA 2 the most i'll do is jokingly say "OMFG KS NOOB QQ QQ QQ". I still get assist gold and the opponent still loses gold (in DotA 2).
However when a team mate waits for you to die, THEN takes the kill... that's a different story (especially when they lose you the game because of it)