See, I've had nothing but good experiences on Guild Wars, and I've been playing it since it was released. I'm not sure how deep into the game you were, but I always kept up on any news related to the game, be it official or community-based, and knew exactly how to tell when somebody was trying to scam me and what to look out for. You can get scammed on pretty much any MMO, especially if you're out of the information loop.
I mostly just play on Xbox Live now, and in my experience, Halo has the absolute worst community right now. Before then, it was Counter-Strike. I haven't been on CS in years, but I'm willing to bet it's still pretty bad.