FACEBOOK'S WORST NIGHTMARE: With GM Pulling Its Ads, Here's How The Other Dominoes May Fall - Business Insider
http://www.businessinsider.com/facebooks-worst-nightmare-with-gm-pulling-its-ads-heres-how-the-other-dominoes-may-fall-2012-5
It appears to be dawning on clients who control the U.S.'s major ad budgets that if your marketing content is interesting enough you don't need to advertise on Facebook. Advertising on Facebook is free, if you can create something compelling enough to go viral without a major media spend behind it.
Burger King Has Dropped Their Wallet | So Good
http://www.sogoodblog.com/2008/11/19/burger-king-has-dropped-its-wallet
"It appears that in the last few days, there are a handful of bloggers who, by finding wallets on the ground, have unwittingly stumbled across the latest under-the-radar Burger King promotion. The fast food chain has dispensed agents across major U.S. cities (indications are it’s just been Chicago and Orlando so far ) to “lose” wallets. However, when unsuspecting passersby find these wallets and open them, they discover an interesting message"
YouTube - Going to Work for SUBWAY: Part 1
http://youtube.com/watch?v=d8eV6OuC8Oo
Remember kids: Viral doesn't mean good. Mocking and derision are viral vectors. And sometimes, there is a such thing as bad publicity.