Yeah, new ones popped up this morning. They're kind of insidious. Most likely automated botnets. I ran into that in the past when I was a mod elsewhere.
It got so bad I had to resort to IP bans... but of course, I also had to be super careful, because I was using *.*s (asterisks dot asterisks), and once in a while, even *.*.*s after checking the IANA tables to see if it was safe to do so.
Otherwise, they'll just keep coming.
Anyways, good luck!