This is more about forum development, but might also apply to the bio censoring part of game development...
I was writing a post where I mentioned bird p o o p... When I went back to read it, it looked like this:
"...airborn so as to **** on your enemy's head"
1) Why on earth would you be censoring the most unoffensive word available for this fact of life?
2) Turning the word p o o p into asterisks makes it look like I am swearing, and makes the passage more crude than before you messed with it. Sheesh! (Woops... is that going to turn into "*****!")