I voted no, I think that people do need to hide their identity in many circumstances (oppressive country, government position for the easiest examples).
However I sometimes want to pass a complete thread to non-slashdot civilians (yes, there are some, they live on the surface, they are hideous) and, as such, I don't want to see 'gay n**ger' (I notice that the full version is defeated by the lameness filter, that's a good start) or goatse etc. in the thread. I don't mind constructive obscenity, such as complaining about world hunger. There are plenty of reasonable moderation policies that do just this.
So long story, short, before tl:dr, it would be good to have the ability to kill -9 those bits. Yes, people can argue that it's 'censorship' but slashdot can argue my platform, my rules. People can go elsewhere to be juvenile. Actually, when I'm feeling conspiracy minded, I sometimes wonder whether it's a form of shilling via 'reducing the value of the thread'. Probably not.