Since there's nothing I can to fuck with him, I just blocked the referrer in .htaccess so I don't have to keep watching clicks to that page coming in.
This is simply not true. You need to think outside the box. There are many ways to fuck with this guy.
Hosting complaints
Back tracking the rest of his business should be pretty easy with someone this dumb.
You can always fuck with the advertiser and or network
How much is the campaign worth to you? Just say the word and the WF dogs can be turned loose in a second