Lens, first of all the simplest solution is to have hun stop img src'ing this guy. But in the meantime, take the traffic from his site and redirect it either to a front door page to AP, (If you need my code By all means feel free to use it)..Or really send it back to the guys isp...and in no time the isp will either go down or they will kill the guys site thus stopping all the traffic.
Just a quick fix for my 2 cents
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