Those are called alts, or mules. "Bot" in FFXI has always referred to an automated process working independently of a user's input. You intentionally used a word with improper connotations in order to take whatever cheap shots you could at him, and evoke either a personal or a community response about botting unrelated to the topic at hand.

Would calling that trolling be a wild accusation? No way. Slander? That seems to have been your game in this. Don't think that your shit doesn't stink. People choose words for a reason.