No reporting from me, if it affects me, like my Adwords could be on their site, or they are in my niche, I may contact them and ask that they look at it, clean up the issue. I see people here at times post as if they are looking for a reason to report people because they feel they hurt their niche, well the best way to fight that is blow them away with SEO and good traffic. I have had problems with the TOS at times, not trying to, like running auto adsense scripts in my Joomla!, or WP pages and the ad's ending up in places that would violate the TOS (not apparent on all pages or at certain page loads), when I notice the problem, I try to quickly fix them. Not all violations you may see were done just to try and make more money. just my 2 cents...