I got an invitation to join sms.ac. A quick Google seemed to indicate it’s not a great idea unless you want to give your mobile number to people who will SMS-spam you.

Further, if they convince you to reveal your Hotmail password (on the pretext of letting you read it from your mobile) they’ll also spam the people in your address book, inviting them to join. Delightful. And the person who “invited” me? She wasn’t even aware it had happened.

So remember kids: sms.ac is bad. Now email this warning to all your friends.