I get a lot of Eugine downvotes, and it looks to me like he very rarely[2] downvotes any of my comments more than once. My guess is that the same is true of Gleb.

[1]I think the large majority of downvotes I get are from Eugine. Of course it's hard to be sure, and obviously "all my downvotes come from the deranged mass-downvoter no one pays any attentiont to" is a self-flattering hypothesis...

[2] Perhaps never? I can't tell.

Agreed that not all downvotes I get are from Eugine. My point is that his downvotes obscure my ability to tell how many are real downvotes and how many are not.

Regarding your other question, I specifically asked for comments, not downvotes. That way, I can check if the user is a Eugine sockpuppet or not.