On one of my two blogs I have been getting suspicious users signing up, mostly from o2.pl (the email given..probably not, actually) with obviously robot generated id's. I have captcha. they are bypassing it somehow. A review of visitors in CPanel shows a lot of Russian hits (a bad thing). Blot content is narrow and specifically targeted to culinary workers in the US, so this is not righteous.
I am puzzling over their purpose. The fact that the blog blew its bandwidth usage twice makes me suspect using it as a spam portal. I spoke with the server techs about this, and they were extremely unimpressed.
I am trying to figure out how to get the users' IP addresses, from which I can determine the ip ranges and block them from the site.
What I think I am looking for is a good statistics plugin which shows user statistics with IP and time of sign up.
What I also need is a sign up system which is more difficult that captcha.
Input and suggestions gleefully accepted.