There's a hole in the bucket... 

Major privacy hole in Window/MSN Messenger by Thomas C. Greene

A nifty feature in MSN and Windows Messenger which apparently was intended to identify IE users (without their knowledge or consent) on Microsoft Web sites can easily be abused by any Webmaster with a bit of Javascript or VBscript, a clever empiricist has discovered.

The feature allows anyone to obtain a surfer's Messenger username and those of his contacts, according to Richard Burton in a post Monday to the BugTraq mailing list.

Worse, if a username is not available, the e-mail address of the surfer and those of his contacts are displayed instead. [read more]

It's dangerous out there!