Oh, that whole scene is notorious for it.
The reason I mentioned Warren Ellis is because he's more or less exact contemporary of NG, in the same field, but even though he's a more interesting writer he's never achieved NG's level of hipster cool.
What happened with Ellis is, in the late 90s and early 2000s he was an unusually accessible writer. He had a forum and engaged a lot with fans on it. And engaged more with certain female fans. Some he ended up in bed with.
Now the reason I believe the stories is that all the stories about Ellis are similar, and because nobody comes out of them looking good. Ellis, who even then looked like a baked potato, was using his celebrity to get his dick wet. That's what men do. And the women who got involved with him were mostly aspiring artists or writers thinking he could get them into the comics industry. Everyone was using each other.
Does this make Warren Ellis sleazy as fuck? Of course it does, that's the nature of groupie culture, even in a small world like comics. But he's not been accused of anything on the level of Neil Gaiman, who seems to be into quite coercive stuff with much younger women who lack much opportunity to say no.
Ellis's career has been completely nuked over sleazy but consensual encounters from 20 years ago. Maybe he deserved it. But there's a pretty good chance Gaiman survives.
Just like #MeToo in Hollywood, it's very revealing who gets cancelled and who doesn't. It rarely corresponds to the severity of the offence.