To the casual observer it's obviously a grey area and TBH I've often thought about removing it altogether. I like clarity. Grey areas, not-so-much.
Note that it says, "... with obvious intentions of spoiling the fun for ALL others".
The worst perpetrator in this regard has been bant multiple times and returned. In his defence, "spoiling the fun for everyone" is from the POV of many not what he's done 'cause they find his toungue-in-cheek ad-hom funny. The number of likes he receives for it says all you need to know.
To "spoil the fun for everyone" one would literally have to insult, in a serious way (not joking), everyone. Accusing the entire forum of being PDFs is a clearcut example of this and as you'd know someone was bant last year for that... twice, the second time permanently.
Hundreds of different statements and nicknames are meant as insults brother.
What can I tell ya; they happen in the locker room on an almost-constant basis.
Some who never engage in that sort of thing don't even receive them but those who get into the argy-bargy know what to expect.