[Drako]

What difference would connecting to an ethernet outlet make? You could get more done by intercepting packets that are using a wireless connection. Unless this port is special and can bypass restrictions set by a network administrator, the ethernet outlet is meaningless.

Whatever you do, I wouldn't bring a Mini PC to your school so that you can hookup to an ethernet port where you probably shouldn't be.

You should also be weighing the consequences of what you're doing. Is what you're doing even worth getting caught over?