First it was the omnipresent Brown Bailout ads, then Groupon began deluging websites with ads. their No, I don’t think people will click on an ad if Adsense allows the same ads to run over and over again on a website.
When viewing individual posts here, sometimes Brown Bailout or Groupon ads appeared in both in the post itself and in the side bar. This is ridiculous.
However, there is a solution. Put the url of the ad site into the Adsense competitive ad filter. However Adsense needs to manage this better. Endless repetitions of the same ads lowers Google’s income too as well as for websites running the ads.