I had one on a good car pics site last night. When I clicked to open a pic to full-screen the ad completely covered the pic I was trying to view and you could only view the pic once you had followed through to the advertiser's website.
I think it's about time advertisers had a set of guide lines they have to follow regarding honesty. You only have to look at the Ribena bull****. Another one is a paint company that says its product painted on this house will cop over 3 metres of rain in a year. 300 or so Hail storms and even more BS like that. Make them back up their claims or do them for false advertising and shame the company involved