If it's a good, clean kill, then no.
If it's a cheap kill, oh hell yeah.
MAG-guy get's me with a nice sniper shot/able to get the drop on me, I'm fine. I learn, and it doesn't happen again.
MAG - guy just starts spamming grenades/RPGs. I hunt him down, knife him, figure out his squad, find his squad's spawn, and give him fifteen second lives (and go after objective so it's not camping

)
AC Brotherhood - hard to get a cheap kill, but if there is one...well...can't really do much about it.
Depends on the game, and the process by which I died.
Especially in New Super Mario Bros./LBP. My family goes down if they use me as a platform.