Anyone miss when fucking with people on the internet, was called just that?: "Fucking with people on the internet".
Also, the term 'trolling' is so broad, and so obnoxious. Any douche who says something stupid on the internet can just fall back on it as some demented, half-ass excuse.
"Dude, you're wrong. You're an idiot."
"Naww, man. I was just trollin' ya!"
It's the keyboard warrior's get-out-of-jail-free card. Instead of owning up to their choices, they use this one-stop-shop, backpedal maneuver. "Whoops! Looks like my opinion, true or not, isn't appreciated here. Better conform!"