Lol no. I doubt most of the people on this site are racist. We are all anonymous. Nobody cares whether or not you use it on an anonymous site and it can only be racially demeaning depending on the context in which it is used. Context is everything. And about 99.99% of the site use it in a joking context.
I'm a blackie and I don't find the N-word inherently demeaning as long as you look into the context its used. Michael Richards fucking up on stage is a perfect example of the misuse of the word as sort of an insult, even though his rage-out is some legendary shit, some comedy genius.
Most people use it in a joking context or just to refer to the person as "my nigga" in the same way someone would refer to someone as "listen, bud", so I don't see the problem as long as its used appropriately, just as any other slur. Words change over time.