User blog comment:Nnn6nnn/The official farewell/@comment-4224897-20180216162640/@comment-4224897-20180217202838

(mostly directed at 89Pepsi Polka)

As he showed when he farmed edit count to get to the top of the leaderboard a few months back, Edwin is the kind of person who won't follow rules unless they're written in red ink. For most people, unwritten rules are a concept followed without even thinking about it, but Edwin either doesn't seem to understand that or doesn't care. I believe "don't harass other members" (basically the rule you proposed) qualifies as an unwritten rule. I don't know if it would help all that much to make it a written rule, because that is a rule by default in almost all online communities and I'd be shocked if it wasn't a global rule in Wikia; since it's a rule by default in most places, it's one most people will just nod at and forget about. But knowing the drama that transpired, and considering how Edwin went here six months and caused numerous disruptions of behavior before being banmed, a rule saying how long you'll get banned if you harass others is probably a necessity.

Also, I can see why you'd be surprised that such drama would happen in a math website, but  keep in mind the following: every online community, if large enough, will have a good share of people completely dedicated to being on there and have a large portion of their social network there. Math websites most certainly aren't precluded from that. Drama isn't pretty, but it can happen even in the most obscure places.