I've tried to lock down the setup on my family's laptops and have the advanced setting "Control the local TeamViewer" set to 'Denied' or to 'After Confirmation' to prevent a remote connection being able to amend TV's settings. This has worked as expected in the past.
Recently I've found that despite this setting being set to 'Denied' I can still control my daughter's TeamViewer settings from my remotely connected laptop. The TeamViewer slide out tray in the bottom right corner does correctly appear greyed out when viewed remotely, however I can interact with it, and can adjust TV settings.
Is this a bug that other's have experienced too?