Combat Auto Posters?

[Whiterook]

I'm having troubles with people using Auto Posting Apps. They register at the site, and then start auto posting. Usually in the wrong threads, and placing ads.

Is there a way to combat users using these applications? Apparently there is an autoposting app already configured with my site added to the list (among several others).

Any ideas?

Edit:
Sorry, I mistakenly added this thread to the graphic section...... *waits for hammer to fall