Kids are the best at USING proxies to get by proxies...
Lots of school system IT admins have struggled with increasingly sophisticated students using proxies to get around their own content-blocking filters. YouTube is full of tutorial videos made by high school students and aimed at other high-school students telling how to bypass the content-filtering on their library PCs.
Suddenly, being in the Computer Club is a social advantage in high school. We all grew up in the wrong time.
Offices are seeing this start to happen more frequently too.