For what reason? They connect the client's PC to an exit node... they probably also use a different domain name for authentication :-)

A URL in with "ass" in the domain will almost certainly be blacklisted on a school network.

When I was at school there was an online amazon like site for electronics called "egghead.co.uk" which was blocked for having "head" in the url!!

That's kind of an extreme case right?

Must be hard to study medicine in that school....