Keywords "gamergate knife".
The other person being discussed, KingOfPol, is known for his narcissism and fabrication of stories, so it's a bit different.
The risk of getting caught is essentially zero: just use Tor and VPN via an 'unfriendly' third country to send fake threats to yourself, or get a friend to do that for you. Clearly the police is not going to investigate, because all these cyberthreats are obviously not serious. The upside on the other hand ... Sarkeesian made how much last time by playing the damsel-in-distress? Wasn't it over $100k? That's quite an incentive. And then there is the political effect: the mainstream media, for various reasons, will automatically sides with the damsels.
I spent quite a lot of time in activists' milieu and I smell attack techniques in a Leninian mould, see e.g. Alinsky's "Rules for Radicals".