http://www.eyed.com/citizen/creditca...lication.shtml (link broken)
edit: Tinyurl version:
http://tinyurl.com/eksuc
meh... website filter is wrecking the link... the guy's last name is c*ckerham, so you need to put "c*ck" before the "eyed" in the address.. anyway, check that out, shows you that even if you rip those unsolitited credit card approvals up before you throw them in the garbage, you could be in big trouble.
This guy tore it up, then taped it back together WHILE changing the address to where the new credit card should be sent.... and the "new" address received the credit card.