I tainted my Facebook data and bailed long ago. Facebook just ain't right. (http://www.freeinfidel.com/2007/12/08/taint-the-data-how-to-...)

Trusting Facebook with the ability to track you across the entire Internet is like trusting a Wall Street investment bank with your money.

In both cases, they're the G, you're the mark, no matter how sweet the sales pitch. They wouldn't be selling you if the deal wasn't better for them.