Obviously quite a few people like this idea, but I see it
as another way for spam to reach me. I try to avoid
having mail forwarded to me because it bypasses my
prefered method of dealing with spam, which is to have
the server refuse to accept it (as opposed to filtering
later). Also I just don't see the point--if I want mail
from someone, I'll give the person my email address (and
if I wanted to conceal that, I'd just make a temporary
quick account somewhere).
So I'm opposed to just going through everyone's names.
Make it optional and I have no problem with it.