Citat fra
http://www.messengertools.net/msn-block-checker.html:"But do MSN Block Checkers really work? The short answer is NO, there is no 100% working method for finding out if you have been blocked! Here's why:
Back in the day, due to the way Microsoft had configured the privacy settings for Passport and MSN Messenger accounts, a Block Checker could find out if a use was really offline or if they had blocked you, block checking was easy and common. Microsoft recently changed this privacy configuration so block checkers can no longer check you if a certain person has blocked you, unless the person has turned off this privacy feature, which is not very likely!
In case the person has not turned off the privacy feature (it's On by default), a blockchecker will most likely tell you that the contact (the blocker) is offline and has not blocked you on MSN Messenger, even if they have blocked you."
/theSurfer