Well, yeah, some people are rude. Actually a lot of people are indeed rude but after being on a couple of other boards I have found that SWF.com people are generally much nicer, helpful, and generally well, nice. I think it's because most of us are eager to share our knowledge and help others who may be just starting in the hobby we love or struggling with a problem. Some people, and I am one of them, may sound like know it alls sometimes when we are really trying to help someone and some people may take offense when being told that they are doing something bad. It doesn't bother me at all and the really rude and antagonistic people (those with those 580 gal tanks!) usually don't return.
I have to say that overall, most people are not rude, and those that are, if I can't win them over then I just leave them alone to live in their own little world.