well, too bad Samus Aran was banned, I would have preferred that someone starts to debating with him proving he is right or wrong. It would have been interesting. Netherless, I can't really say I support his words ...
About Katrina and L4D2, the problem is not the black zombie, the problem is the black zombie considering the setting of the game. Also, it is more a question of respect about the victim (that were mostly black but not only) than a question of racism !!!
it is like making a game on the WW1 or the WW2 or even the World Trade center explosion considering how people have suffered from these events !!!!
At the end, some poeple are still too much "race focused" ... too bad for them.
EDIT : I forget to mention I have thus no problem with L4D2 ...