OMG why is everybody noobing in MW2 all of a sudden?

Hey guys,just playing some team death match on Sub Base on MW2 with the class:
Scar-H silenced
RPG-7
Scavenger pro
Stopping Power pro
Ninja pro

Now as you know people always come through the building if you spawn on south side of the map so I fired a rocket hoping to kill anybody hiding in there and got a 5 man multi-kill so then everybody starts tubing on the enemy team.Why would you start tubing just from 1 rocket killing you and the RPG is NOT for killing people,its for air support lol.That is the only rocket kill I got in that match and next match I’m in people are still tubing.Why would you start tubing just because of 1 rocket kill without even using danger close?
Ok I know that would be easy to do using stingers and javelins but it takes skill to with the RPG to shoot down air support that’s why I use it.By the way tubing is really not my thing it sucks,only time I do is to piss off campers.Only reason I asked this question is because I don’t see why people put on a One Man Army/Danger Close/Grenade Launcher class on because they got rocketed once.
Good answer John thanks and will try hardcore instead.
Best answer for you
Dude I know nobody cares,it is more for me because it makes it too easy to put cold blooded on and use stingers that’s all
Oh and one more thing-suppose I’m in a chopper gunner or AC130 and some low level noob copies my class-they would only have an RPG to shoot it down making it harder that’s another reason I don’t like stingers or javelins on my class