I don't like it when people get dismissed by their avatar on boards like these either. But on places like Twitter the term fell into use due to floods of people with little girl anime icons harassing them.
This. Fuck anime avatar Twitter. It's filled with vitriolic, racist, sexist homophobes. I've got so much abuse from anime twitter that I refuse to use an anime avatar there because of the association. Here is different, I know that people like that will get shown the door if they show such views so I find the avatar dismissal here a bit strange when compared to Twitter but I'm not offended by it, because I totally get that this is picture painted and its unfortunate.