Using Chrome OS's Guest mode feature, attackers can view your Wi-Fi logs to get your location and track you. Here is how to disable guest mode.

How to use Google Chrome without logging into any profile? If you wish to use Google Chrome without logging into any profile, you can choose the guest mode from the Profile Selector window.

If you're looking to restrict Chromebook use, turning off guest mode is a good starting point and there are a few other options too.