I have no idea how to stop these people clicking on my ads. Maybe NO MYSPACE in the ad will help?
There are two ways to exclude individual sites from your Google content campaign:
1) You can launch a site-targeted campaign, where you pick individual sites to include in your campaign. However, with this model you pay per thousand impressions, not per click.
2) You can manually exclude individual domains from a campaign with content on by in your campaign view under "Edit Campaign Settings" where it says "No Excluded Sites: Add". Click "add" and then you can enter myspace.com as an individual excluded domain.
Mike