I've got several machines, running 14.04.1, for kids to access. Each machine has accounts for each kid, as well accounts for several adults.

Although I've set a system wide proxy use policy, it doesn't get used by Chrome. Instead, I had to log into each kids account and set a proxy use policy, pointing to tinyproxy/dansguardian, for safe internet access.

The problem is that, should the kids get an ounce of computer savvy, they'll figure out that they can launch the proxy settings config panel from Unity, then change the proxy settings to None, and completely bypass the "safe" internet scheme I've setup.

Can anyone tell me how I can disable those user accounts from being able to modify their proxy settings (not the "system wide" ones... those arent used.. this is the per-user settings).

Thanks