[AtoZ]

There is another thread about this. A lot of us have been getting hit hard. Mine have been also posting their URL in the location profile field.

You can use Stop the Registration Bots. It works beautifully.

You can also use Check4Spam to prevent spam from appearing on your forum. I was using that already and in spite of the hundreds of bots that have signed up in the past couple of days, none of them were able to successfully make any posts. Since I've installed it, I have 1 or 2 posts out of hundreds slip through and that's only because they didn't include links or anything that made sense.