[kawera]

Thanks! Pardon my ignorance but what if the content url itself came encoded in the same manner?

[Sanddancer]

They'll lose some of their SEO juice because their URLs are no longer human-friendly. Hashing everything would be more costly than letting some people block ads.

[nailer]

You could have human friendly URLs for articles and use hashed URLs for image and video content.

[sarciszewski]

They would have to hack into the websites we already trust to serve as a proxy for their ads to bypass a strict whitelist.