incrediBILL - 11:13 am on Feb 26, 2013 (gmt 0)
Nooooooooo, please, no. Imagine the opportunity for spam.
I've actually given this quite a bit of thought and anti spam would be pretty trivial really because a spammer would have to probe the addresses to find out if someone had a registered forwarding address so they would easily get caught. Plus the recipient could define the parameters of incoming content based on geography thus blocking the usual suspect spam sources.