Not unless the person really pissed me off. For example, I was recently in a game of the original Halo (Custom Edition on PC) and killed this one guy with the Warthog's rocket launcher. He was probably around 12 or so anyway (though without a mike and headphones I was only able to read and type communication with him), and started moaning that I lacked skill because 'anyone can use rockets to kill'. Never mind that he was in cover, I was using a Warthog rocket launcher while someone was driving, my driver was pretty crap at driving, and we were going full speed up and over boulders and other obstacles, making aiming a complete nightmare. Not to mention the fact that the way the weapons in the first Halo game were designed, it does actually take skill to use weapons like the rocket launcher, if only because you need to actually hit the target or near it to score a direct kill, and there was plenty of scope here for me to miss completely.
Anyway, after I pointed all this out to him he started with the standard generic insults that I rarely hear on PC gaming like this, but sadly are too common in places such as Xbox Live. So then after he killed me once, using an actual cheap tactic (camping around a corner with a shotgun, if I recall correctly, which to be fair to the guy I've sometimes done myself in Halo in tight-space maps like Rat Race), I went out of my way to kill him about five more times, all in different ways, before pointing out my skill compared to his. The guy subsequently rage-quit while I received kudos from both my team and his for showing him what an idiot he was being.
Which is actually pretty good on Halo, on PC. Unlike the Xbox Live multiplayer, PC multiplayer seems to be (in my extensive experience, at least) much more friendly and open between people. There isn't the usual dearth of people calling each other 'fags' and insulting each others mommas that you get on XBL, instead people are prepared to just play the game and have fun on PC. Which is why I much prefer PC gaming to console multiplayer, though that's another story...