MacNN has a feature about a German Ad Angency who ran a pro-Mac ad without Apple's authorization.
Now Apple is threatening legal action. The company (Springer & Jacoby) paid $13,800 out of pocket to run the ad which read "Dear Windows user: 'We Love You'" with the Apple logo and "Think Different" written below.
While it's understandable that Apple would like to protect it's trademarks, you've gotta love this company's initiative.