Social network "viruses"

From a friend:

Beware Netlog !!

I strongly suggest that you NOT click on anyone's Netlog sight should one come across your computer screen!! Through some highly deceptive ploy on their part, it will sign you up to join (even though you have not officially done so), and the result will be that your e-mail address book has been opened up and quite literally tapped into. Everyone in your e-mail address list will receive an "invitation" to look at your sight, thus setting off a chain reaction that taps into YOUR address book!!