I think someone upthread said they now had a policy of deleting comments which had appeared screen-shotted in twitter posts. Which would be a bit strange. I remember one of the deleted posts ('cos it happened to be a couple of posts after one of mine) and it was entirely unobjectionable, simply agreeing with something a previous poster had said (and the post they were referring back to still stands).
As far as I can see, there are a few posts mentioning named individuals, either because those individuals have criminal convictions, or because those individuals have said things about themselves in the public domain which are being quoted.
No one on here has made blanket statements about "all of group A are guilty of crime B" - what they have said is "people guilty of crime B are trying to use people of group A, most of whom are completely blameless, as a cover for their criminal activities." And people have also said "where there's a straight clash between an individual's right to self-expression, and child safeguarding, child safeguarding should come first." I can't see that either of these positions are contentious or deletable.