Every hacker, every entrepreneur, every creator should derive inspiration and uplift from Facebook's story. It's a rare bright day in the middle of the worst economic environment since the 1930s. It doesn't matter whether the company will grow into a $100B valuation. It does matter that it was started in February 2004, by a single guy with a computer, and has affected the lives of billions of people and created billions of dollars in wealth.
Maybe the markets won't be kind to them. Maybe they won't grow into the $100B valuation. But outside of those who are direct competitors, I can't understand anyone who actually wishes them ill. As a creator, as an entrepreneur, as a hacker, if you tear down Facebook you're just tearing down yourself.