Yes, I consider it acceptable to mock an internet celebrity when you think they're acting like a complete and utter tool.
Before you draw parallels to Anita Sarkeesian or Zoe Quinn, it's probably worth pointing out that making fun of someone for their behavior isn't really equivalent to doxxing, death threats, and slurs.
lol, so calling someone a neckbeard, fat, a guy who sucks on turds and so on... aren't slurs? Does the fact that the words aren't politically loaded make them fine?
Also doxxing - by going public with all this, they are public figures and they put asids the veils of anonymity, you can't dox a public figure.
Oh, and you also need to prove that Zoe was doxxed, in a post that doesn't include somewhere "The head mod of 4chan.org/v/".
Death threats - the only one that I would actually consider a threat, and not some dumbass flamers on twitter/youtube is the recent one with Anita (the one where someone actually cited her address), other than that, all of these threats mean nothing, that's how mad teenagers write, if you have a problem with that, write something about this, don't just go and say "that's how all misogynistic gamers are!".
The fact that they hate you, and that you are a woman, does not mean that they hate women, they only hate you.
Oh, it also seems (according to the video that Dugna posted) that Jontron is
also getting death threats.
Seems like everything's even now.