I'll test something: every 5 minutes I download
patrol, if AlexPromo is still posting I'll script all usernames out of there and give you a nice list to nuke.
I'll let this run for a couple of days.
Downloading patrol actually paid off: Alex started a new spam round. So far I found 447 accounts.
I've only checked a few manually, it could be someone who quotes the spam gets listed too, but it's unlikely as all accounts are registered on January 13.
He's currently still posting new spam with these accounts. The total number of accounts doesn't go up. After nuking all, he may need to create new accounts before he can spam again.