long as the E-mail field is on every page, posting e-mail addresses
should never be a reason to delete posts unless they are obvious calls
to invasion. if people are too stupid to use yahoo or spambox or the
multitude of free services out there and post their real e-mail on
4chan, they can't really complain about anything.
also i see it
as a legitimate request. most of the time the invites are for private
torrent trackers like Demonoid and if we start killing them from /r/
they'll just go to /t/ and they'll still get deleted. so i'm with >>985 on this. let them be as long as they stay civil, but delete the second it turns flamey.