Sign out..
Some of what happens is FB fault, some is on others. Bing checks your FB cookie if available, much like Google will check your gmail or google+ cookie if available.

Better yet, set your machine to clear cookies everytime the browser is closed. You'll have to sign back in all the time but your cookie will be empty at beginning of session.


I do not work here, but the benefits are still awesome
Make your sound your own!