The comment policy is that you should make comments. I've yet to encounter a situation in which the comments needed to be policed, but in theory I will delete things that I consider wildly inappropriate. Trust me, you'd have to go pretty far to qualify. If your comment does not appear immediately it has been sent to moderation, which happens only when the comment includes a link or in-text URL.
If you say something really stupid, someone is probably going to be mean to you. Usage of the term "someone" is a weak effort to depersonalize the fact that I am probably going to be mean to you in these instances.
Repetitive and/or irritating trolls will be added to the spam filter. Sorry. Unlike the rest of my professional and academic life, this website is a place in which I don't have to suffer stupidity.