Debian said:I wouldn't be too sure of that. I'm Network Manager at a group of schools and though we try to block proxy sites the pupils are exceedingly good at finding new ones that our systems don't block. Besides, there's no configuring of IE involved, it's just a web site that then allows you to hop off somewhere else without appearing to go there.
True although those normally require some kind of subscription unless they know of a dodgy account.
You can of course configure proxy use within your browser if you wish.