If you just found a new product that you want to try out, and you go to the login/signup page to find that you can signup using Facebook/Google/Twitter/Email, which option do you choose generally?<p>And why?
Email with a throwaway address. I don't use Facebook, I don't trust Twitter, I don't expose my Google account, and I don't trust a new product with my real email addresses.
Facebook, Google or Twitter, because I don't think those companies know enough about me yet.<p>Sane people use Abine's Maskme things they think they might want to use and Mailinator or one of the other disposables places for those they doubt they'll use.