How to detect Invisible Users on Messenger

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What is BuddySpy?

Buddy Spy is the premier program for Yahoo! Messenger status checking. With Buddy Spy you can now bypass Yahoo! Messenger’s Invisible Settings with ease. With its quick and intuitive interface Buddy Spy offers you the ability to see if your friend is truly online or if they are invisible. Not only does Buddy Spy offer you online checking, but it will also tell you whether your friend is in a Chat Room or even if their Web Cam is online!