Comment 4 for bug 391761

Please switch this to importance high! This isn't only a small issue with fork bombs:

I just stopped my system just by accidently holding down "enter" for a second while a video file in nautilus was highlighted. This spawned a vast amount of VLC players which in turn results in excessive swapping.
Recovery took about 1/2h just to login on the text console prompt and killall them. Thus any normal user is easily capable bringing down the whole system without proper limits.