Sure. Although if you want to take a more liberal definition of trolling, it's really posting anything designed to get a negative reaction for the pleasure of seeing the reaction.
Jumping onto the Geelong board to "rub their face in it" if Dangerfield signs? That's trolling, and it's what's being discussed at length here.
No it isn't. What's being discussed is whether this thread should be open to other clubs. You've missed the point.
I can at least see the argument that being constantly negative towards the club raises questions about your level of support. I don't agree with it, but I can understand it. And make no mistake about it, you've proven to be ceaselessly negative in your entire time on BF.
But claiming someone's not a supporter because they don't want to go onto an opposition team board on Bigfooty and thump their chest? What, am I not a supporter if I don't defend them on a Crows subreddit either? What about if I don't have a Crows tumblr account? It's a ridiculous argument.