Thanks for the suggestion, but it doesn't seem good for me. Blocking things at DNS level, can be counterproductive. Maybe there's a false positive that's been blocked and it will probably a headache to find it.

I don't think I've ever experienced this. Perhaps the lists I was using were just particularly conservative.

It's pretty easy to whitelist a whole domain... the domains on the lists are pretty comprehensively ad-related. Your call, but it certainly is one solution.