Yes, and not just in comments, but occasionally when you sort by new, the same one loser (they use either the same pfp or a name with a sequential year or something, I can't find them in my blocked list, those accounts must have been purged) will post extremely racist or transphobic shit, almost like they want to get banned on sight to reinforce their delusions of persecution). There have also been targeted attacks on the autism communities with someone just posting the r slur over and over again. Report and block is the only thing to do really.
Either way, this is typical of any even moderately progressive space, but the more radical you go, the more bigots and trolls will come to smear their shit all over the space, it's an inevitable result of the overinflated sense of entitlement that comes with privilege.