I started getting emails from Facebook, because someone had used my work address to create an account. (I get a lot of spam on this address - it being cb@... .com)<p>Really, very annoying! I guess this is kind of to be expected of Facebook, though.
I'm not sure what to make of this farce, but I'm definitely not following Mike's suggestion to create a facebook account and list all my email accounts there.
It's a tradeoff really, had they required an email validation before any actions there would definitely be a drop off rate in completing signups, especially early on when people didn't have large social graphs on facebook to pull them in.