Lists of cell phones containing an email address don't have URLs in them. I say captcha their asses, at least make them work to spam us.

Thanks for the suggestions. The site's customized vbulletin version does not support captcha on replies yet. It might take some time to upgrade it since it is customized to work with the blog and the content management system. I'll see if I can find hacks for it though.

Since they're interested in the site, you could also forward every new post to the email they're using to hawk their goods.

(Obviously that'd invite retaliation, but in principle it's drole.)