[omni]

I think you might be conflating the terms "troll" and "asshole." If you show up to a subforum on SA and start actually trolling people by posting spam or a bunch of NSFL images or something, you'll get banned pretty much instantly.

[zem]

That's not trolling, that's vandalism. Trolling is posting things for the sole purpose of inciting flamewars, or getting people to believe you were serious and react with disproportionate fervour.