You used you friend’s computer or a computer in a cyber café and forgot to logout from there. And now you fear that somebody will access your private messages and put a wired status update.
Well friends often do things like that I mean sending a dirty message to your crush from your Facebook account.
Here is how you can logout of all the sessions remotely
You can find this option in the account security in account settings, you can just click on end activity and the session will be closed on the particular machine.
