Always liked your name, Tabarnak. Your middle name must be "d'Ostie de Criss" ?
As far as PCide go, we have had many experiences, some good, though most bad. In a Shadowrun game a PC was killed by a party member for acting stupidly (Yeah, we blowed up those mafioso good, eh? BANG), but in that setting it's just normal. In Vampire it happened a couple of times, but mostly because of Player/Player problems, the game being an excuse.
The people I play with have always entertained the PC Halo thing, while I found it stupid. When characters hate each other, they tend to stick together, while making the other's life as wretched as possible. While they get the job done, the game isn't really fun, and everyone suffers. In real life people that don't belong together tend not to stick together, right?
I once had my N Halfling thief kill (with a devilish plan) the Pixie (a PC) who had been with us for years. I was the only one to know his Pixie nature (he mostly polymorphed in a human shape), and in the fights he always ran away. We then saw tiny arrows sticking out of the enemies (and our butts, as he fumbled often). I had followed him and found out. Since he was lying about himself, and looked treacherous, I invited him to steal some houses. Once on site I backstabbed him, killing him outright. Even the DM hadn't seen it coming. I was happy and so was another player, but the others were so angry (even if they all hated the damn' pixie), and, to soothe the angry mob at the table, my character bragged about his murder, so the cut him in pieces for his deed (they were good.. ).
This player often plays strange and funny characters, while we do serious ones, so we often end up with arguments and unfunctionnal parties. Now we tend to create our characters so that such problems are minimized.
But I am definitly not in favor of the whole PC Halo, and I get upset when bugbears heal my 1st level PC so he won't die.