[copypasteweb]

Any free email provider can be used for fake, one-time, temporary email addresses - it just takes a bit more time to register another one. It's just annoying when email is needed to create an account, and way more annoying when it filters email addresses for no reason.

[wyclif]

Yes, and this is a war that cannot be won. Measures like this will simply escalate it to the next level. The reason people use throwaway accounts is because they don't want to receive email as a consequence of signing up. The solution seems simple: don't require email to create an account.