What makes this particularly bad for iOS users is the fact that you cannot delete a wifi connection if you're not there. The interface just doesn't show all your previously authenticated networks.
So imagine that you travel, go to a few hotels and use their wifi networks. Once you're back home, the fact that you used these networks is still broadcast everywhere, and there is no way in the interface to turn that off.
So imagine that you travel, go to a few hotels and use their wifi networks. Once you're back home, the fact that you used these networks is still broadcast everywhere, and there is no way in the interface to turn that off.