Kayruku Isachenko

For the last two years in the adult groups that I am in there has been a guy who has been creating new avcounts every day for the last year and is always spamming the groups. While its not a big deal, it gets old very fast and it has been going nonstop and has been getting people to leave the groups. He has been AR'd a bunch of times now and is still at it, what can I do to help aside from asking the group admins to kick him and put entrance fees on their group?