I remember reading here some months ago about a site containing a black list with mfa and adsense search results pages that could be implemented to the competitor's adsense list to block this sites out.... Can you provide me a link for that page please ?
Here is the post for adsense black list http://forums.digitalpoint.com/showthread.php?t=68792 I would just check sites advertising on yours. Do not click n the adsense ads just look at url and check site out. If they have adsense ads or are clickbank site then block that url. Why block urls that might never be shown on your site. You can see more money doing it one site at a time. If i get low paying clikcs for 2 days i check all urls on ads.
they only way is to individually filter out to darned mfa , damn em , aargh , pisses me off why adsense isnt banning them in the first place.