[spam]
Matty, people would not use i_wanted_to_have_a_super_long_email_so_now_i_do@hotmail.com, they would use ihavearetardedlylongemailsonowidoandtheresnothingyoucandoaboutit@hotmail.com, if they wanted a long e-mail address.
[/spam]
Anyways, you should suggest this to microsoft, as this would be useful for people who have to pay to recieve messages. Also, some people find it fun to spam people's phones. I once got 47 messages from the same guy saying things like "hey" "how r u" "what's up".