I reported the bot to GitHub, hopefully they'll do something. If they leave it as is, I'll leave GitHub for good. I'm not going to share the space with hordes of bots; that's what Facebook is for.
Which profile is fake? Someone posted what appears to be the legit homepage of the person who is accused of running the bot so that person appears to be real.
The link you provided is also a bit cryptic, what does "I think crabby-rathbun is dead." mean in this context?