How do you block the proxy service 'surfbouncer' (on a Mac)?

[jdm]

I'm trying to block social media sites like facebook on my employees workplace computers (macbooks). I blocked all sites via the 'terminal' program but they still seem to be able to access it through 'surfbouncer' which I can't seem to block the same way. Your help would be appreciated. Thank You

[dim]

The answer is to convince your employees to do their job. Trying to block something like this is impossible.