Wait until your site gets popular. It'll get fun sooner or later. The latest thing I'm seeing on my site is a robot that automates real web browsers, jumps be

Wait until your site gets popular. It'll get fun sooner or later. The latest thing I'm seeing on my site is a robot that automates real web browsers, jumps between ip addresses, scrapes real user content off the site, then posts it back using some form of Markov generator to make the content look unique. It'll do that on new accounts for weeks before trying to insert any links. It's amazing the lengths spammers will go to to get their content onto your site. In this case, the crawler is clearly written specifically for my site, even though it's only PR4 and nofollows all its links. It's no wonder 99% of the content on big sites like Blogger is spam.