Originally Posted by winkydink
Possibly your name and credit card number in unencrypted form.
Swipe here to steal ID
By Robert L. Mitchell
Sep 19 2005 - 5:20pm
If Peter Wallace’s recent experience with hotel access cards is an indicator, leaving your electronic hotel room key behind when you check out could leave you open to identity theft.
Wallace, IT director at AAA Reading-Berks in Wyomissing, Penn. has been bringing a card reader with him on business trips to see what's on the magnetic strips of his hotel room access cards. To his dismay, a surprising number have contained his name and credit card information - and in unencrypted form.
Rest of article
This has been making the rounds via email spam for quite some time.
see
http://www.snopes.com/crime/warnings/hotelkey.asp