That's me! Unfortunately, I don't have any clever solutions to active spamming other than responsive moderation, and better mod tools whenever they become available.
I was notifying instance admins of suspicious user totals that looked like swarms of auto-created bot accounts. Last time I checked, half a dozen admins that I contacted have deleted about 250,000 suspicious dormant accounts. It's not a solution to the problem, but it's something.
brainfreeze