Ugh, I always hate fuckers like this for how blatantly self serving they are. Go through the feed of any of them and you're guaranteed to find tweets/reblogs/whatever of them jumping on the bandwagon to make fun of the artists like Rory, or plebcomics, or the artists who work on Steven Universe, or any of the other people who've been deemed "acceptable targets" for ridicule, while at the same time throwing the biggest bitch fits you've ever seen at the slightest whiff of someone sending even the gentlest of ribbings their way. And if anyone ever points out the hypocrisy of this, they'll perform all sorts of mental gymnastics to rationalize it as being different somehow.
I realize I'm a minority on this front, but I've always felt that any sort of art people put on the internet, including your own, is open to any and all sorts of criticism, and if you can't handle that then you probably shouldn't be an artist. (On the flip side of this, if you can't take criticism then you have no business dissing other people's art.) These people are like if comedians went around saying people shouldn't make jokes about them and claimed hecklers at clubs were harassment.
It's not about "defending" poor oppressed artists from mean words on the internet, it's a bunch of narcissistic twats defending their over inflated egos.