I just feel bad when you approve such comments and then have to answer them, when you could just not approve them. Though, I guess that's one of your big maalos, that you allow almost anyone a voice.
It's a slippery slope. Some bloggers won't approve any negative comment, period. Some forums, like FT, are so heavily moderated that they lose their sense of humor.
R rated comments go to the trash, but where do you draw that line between fair criticism and going too far?