"Could the case be made that a classmate you don't like made fun of your mother's size and since you both also play SC it could be argued that it's a personal attack and thus worth of having their account banned?"
I believe I have been very clear in all my posts about actions being related to game advantage and there being no prior connection between parties as in the RingsII example. I need say no more on that, I have said it about 3 times now, all I can do is repeat myself.
Two further points:
1) The rest is already covered and explained in the ToS for in game infractions and why when you say which frame of morality I say the one which already exists... because it does. I'm not going to go copy/paste all of CIGs literature here, I've already inked you directly to section 4 of the ToS "Rules of conduct" in my previous post which does have advice addressing examples, legalities and local customs etc, it's a good read if you have the spare time, enjoy
2) You've already agreed to and are currently beholden to this set of terms regarding your conduct in game and on RSI services such as spectrum. Apologies for being the bearer of bad news but if you don't like the wording of those terms, you're already living them...
Quick question though, a thought has just occurred to me: If a player Doxxed a devs address outside of services CIG has control over like Spectrum or in game chat, or worse case started stalking a dev IRL, do you think CIG'd keep their account active because it wasn't done on their set of services?