While I can agree with Wil that it's not cool to yell at someone for something they literally have nothing to do with, I fully understand and agree with the people that are mad at writers for the Halo TV series.
We live in a world where the only film/television series that legitimately respects and caters to actual fans is the fucking Sonic movies. Everything else is "lol, the game is for fags, we're going our own way" and then getting pissy when the people targeted fucking hate the property for being a bastardized piece of shit. So, I don't think toxic fandoms is a problem, let alone a valid thing to complain about.
Wil, the easiest way for your wife to handle this situation is to just outright say "I have nothing to do with Halo, you're yelling at the wrong person" and if they persist, mute/block them. That's it. It's that fucking easy, stop whining on Tumblr like a fucking teenage girl.