I think the concern is that there is one particular poster who seems to enjoy causing trouble (quite upsetting trouble sometimes) on friendly little forms - some of us recognise his style/use of language/and several of the many changes of identity that he uses.
He has been around for some years and just pops up from time to time, sometimes assuming more than one identity and then he argues with himself and others get drawn in, then they get attacked.
Sadly it's just as well to be aware. 