Trust me, my school would detect any proxies if I tried.The downside of my school is that we have really pro computer staff who are really good and blocking stuff. And fortinet is a #%^#$. The alternative urls don't work either. Its a pity, youtube used to be totally unblocked but now the use EDU which blocks everything including educational stuff.
I got the idea for gdoc off a mate who runs a rp at school using it.