You babysitter was probably just checking her Facebook and chatting with her friends. Maybe checking Piggington. It’s sketchy that she did it without your permission, but she probably just wanted to do what most babysitter types do on their computers. I doubt most babysitters are out to steal your private information.
That said, all of your computers should be password protected, especially laptops and even desktops. Even if they never leave the house. It’s an added layer of protection if they ever get stolen (or if prying babysitter eyes want to hack your shit).
You can add a basic non-password protected guest account if you want guests to be able to use your computers.
Yah, having to enter your password is an annoying 5 seconds added to the boot process, but 5 seconds of time is worth the piece of mind for me.
