I have experienced this there, as well. As a Baptist who is trying to understand the theology of the Paedobaptists, I have received a lot of condescension and arrogance there. Many of them clearly view us Baptists as inferiors. I am not being sarcastic; I truly believe they feel we are inferior.
Furthermore, when sub-Christian rhetoric and language is pointed out on the Board, the admonition is most of the time dismissed and the iron sights are then placed on you, your character, and your understanding of the Reformed standards (rather than Scripture).
Needless to say, while Christian Forums is not as active, I find the Reformed people here to be far more tolerable.