There is no set list people make thier own list to keep away ads from competing sites You can also add into that list of known low paying ads.
I was not concerned about competing ads or low paying ads. I was just interested if there was a list of ads that never convert and are always displayed. For example, I get ads from vonage.com and wirefly.com almost all of the time.
How many non relavant ads you are going to block and they are many, if you block one other pops up...It is not possible to block all on our side. Instead if YPN start showing more relavent ads that would be good.
If you don't think the vonage and wirefly ads are converting (how do you know they aren't, by the way?) you should just go ahead and add them to your filter list. I.e. if it doesn't fit in with your site/audience, don't let it hog up the primo space.