I had some good mentors early on, most notably an editor known by many names, a long-term Wikipedian who, for his own reasons, kept dropping accounts and starting up new ones, though under (originally) no sanctions. He never used two accounts simultaneously, never went back to old accounts, and all were acknowledged or blatantly obvious, far from concealed. One of the names was Sarsaparilla, it's not hard at all to find another going back about two years before I met him. Older accounts he never revealed even to me, and he had real-life reasons to avoid disclosing them, he claimed.