When you've seen at least three "Catholics Aren't Christians" threads.
When you're a Protestant defending the Catholics in said threads.
When you've seen at least three "You are not saved by faith alone!" threads.
When you've seen at least three "Trinity is a false doctrine" threads.
When you've repeatedly spent a half hour replying to a post of an atheist, only to have it utterly ignored.
When you've added people from CC as friends on Facebook (5 so far).
When you find yourself irritated by other people in the chat rooms.
When HarpyEagle unleashes a bit of his sarcastic wit on you.
When Maxx_Power accidentally trolls you.
All 9 fit me... oh boy.