I can’t speak for the mod but I (probably) wouldn’t ban carnists for being carnists. It’s not like fascism or racism, where open fascists and racists are a relatively small percentage of society and banning them deprives them of a recruiting platform. The vast majority of English-speaking people eat meat. “Lol bacon is good” is a typical response to anything vegan in American society. And it’s a false consciousness response - people say things like that to avoid thinking about the reality of carnism and its concordant factory farming.

And as you noticed, this is a pretty inactive instance. There’s not a thriving community of solarpunk vegans (yet) and there’s no serious debate or activism or community building to be disrupted by troll posts.

So I’d prefer to let people post those “lol bacon is good” comments, take the opportunity to ask why they found the need to post them, and maybe open some people’s minds and educate them, rather than banning them.