I'd be happy to talk about it if it existed, I'm still working out the details. But the basic idea is to take advantage of the fact that Anubis is a very popular project from what I've seen with logs that server admin have submitted the same IP blocks and the like hit instances of Anubis so some kind of IP reputation thing would work for this.

I am also working on some noJS checks, but I want to test them with paid customers in order to let a thousand flowers bloom.