My local online newspaper has started putting up a massive footer to tell me I'm browsing them from behind an ad-blocker.
http://www.oxfordmail.co.uk/
"Did you know that advertising supports local journalism and promotes local businesses? Find out how to turn off your ad blocker."
Me not clicking on adverts supports local journalism? Pretty sure the first law of thermodynamics paraphrases to "you can't make something from nothing".