For the last several days, I experience a serious AdSense spamming issue. All my ad slots (on all my three sites!) display ONLY low-bid sites containing ONLY google ads and obviously originated from one spamming source. On target sites, google displays normal adequate ads I used to have for years!!!! These ads on my pages, naturally, have very low for me clickthrough rate, which results in TEN TMES lower CPM since they started! For example, here are ads on every page of my three sites. They vary depending on keywords specific to a page and for 'weight loss' page, they are: 5 Week Weight Loss Diets Simple Diet with Good Success Weight Loss Diet: Easy To Follow http://www.d4z.co.uk/ppc/diet/diet_exercises.php?ppc=google+d4z.co.uk&cpn=5+week+weight+loss+diets Weight Loss Diets Diet with Many Success Stories Weight Loss & Better Lifestyle http://www.v40t4.com/ppc/diet/diet_food.php?ppc=google+v40t4.com&cpn=weight+loss+diets Top Weight Loss Diets Need Help with Your Weight Loss? Weight Loss Diet with Easy Steps http://www.go-22.com/ppc/diet/weight_loss.php?ppc=google+go-22.com&cpn=top+weight+loss+diets Weight Loss Diets Recipes Need Help with Your Weight Loss? Easy and Quick Weight Loss Diet http://www.2y41.com/ppc/diet/weight_loss_exercises.php?ppc=google+2y41.com&cpn=weight+loss+diets+recipes Weight Loss Diets Food Really Successful Way to Diet Easy Diet with Recipes http://www.os-f.com/ppc/diet/diet_success.php?ppc=google+os-f.com&cpn=weight+loss+diets+food Low Calorie Diets Food Get Your Own Diet Success Weight Loss Diet with Simple Steps http://www.n9110.com/ppc/diet/weight_loss_diet.php?ppc=google+n9110.com&cpn=low+calorie+diets+food Compare Weight Loss Diets Easy Steps to Dieting Weight Loss Diet with Quick Meals http://www.2y51.com/ppc/diet/gi_diet.php?ppc=google+2y51.com&cpn=compare+weight+loss+diets Weight Loss Diets Sites Easy and Successful Dieting The Quick and Easy Weight Loss Diet http://www.g-61.com/ppc/diet/weight_loss_diet.php?ppc=google+g-61.com&cpn=weight+loss+diets+sites
The adsense system is set up to show the higher paying ads. Are you showing too many on each page? Sometimes, you get days from time to time when some weird ads do show up, but it usually corrects itself quite quickly. I no longer bother about blocking ads. Maybe I should.