I’m not at the point of naming users, but I recently removed a post with no content other than personal abuse, and also a post that responded to personal abuse.
7. You are free to express your views candidly and forcefully provided you remain civil. Do not use the forums to send abuse, threats, personal insults or attacks, or purposely inflammatory remarks (trolling). Do not respond to such messages.
Also rule 1 is relevant:
1. The general topic of each forum is given by the posted forum description. Do not start a thread in a forum unless it matches the given topic, and do not derail existing threads with off-topic posts.
There is no limit on what users can contribute, as long as they are bringing something to discussion of the topic at hand.