First, the rage comes because this guy is weaker than us. When we feel safe, when we're not afraid (of him), we're free to explode in rage. (That's why there's road rage and not elevator rage.)...and you know, it worked. Well, not "rage" per se, but maybe an outraged sense of pique. I did joke with Bobbi that maybe someone should stroll into that "rape tunnel" and shoot the guy in the kneecaps; she reminded me that the very act of entering the tunnel would make a self-defense claim a little shaky.
Anyhow, "trolling as art"? I'm hoping this didn't require any grant money.