@user21820 Indeed, the answerer wrote
this meta question on meta, and their main site profile is here](
math.stackexchange.com/users/402454/…;. Notice Asaf's comment on the meta post, and my concern listed in the mod's office. They got 60 upvotes yesterday alone, capped out at 200 or 215 yesterday, which is virtually half of his rep at this point, over 11 months.