They call it a “Terms of Service” but it includes the rules and regulations.
legal.lemmy.world/tos/
It’s in the sidebar on the front page.
EDIT:
ETA: for context, a comment of mine was removed and “rule 2” was cited but the rules in the TOS don’t seem to be relevant.
It was listed as a moderator action, and the community it was involved in was [email protected]. This is actually a lemmy.ml instance, and rules from lemmy.ml and the shiposting community apply. Rules from lemmy.world don’t apply in this case, rules from lemmy.ml do.
Rule 2 on Lemmy.ml is “Be respectful.”
Also, the mod is from lemmy.ml, which generally has a lot of people who vibe with hexbear, and that moderators profile literally says “we do a little trolling.” I wouldn’t take it personally or do anything about it. Just move on and accept it.