Well, the fact remains that the trolls are indeed everywhere. Given the nature of this site, you get not only liberal trolls from Demoncratic Underground, but you also can get the white supremacist whacked-out conspiracy theory ridden trolls from their underground fallout shelters.
It's just one of those things that happen.
Then there is the infamous Blaze of Glory, an individual that seems to have really pissed off the moderators here, but has tried registering new screen names over and over and over again. But that's another story.
Unfortunately, this is just one of the things that netizens simply have to deal with. Kinda like how when you wash your car, it never fails that a bird shits on it. But like you said, the vast majority of the members on this site are indeed very helpful and informative.
the_reject