

It’s definitely not legal, especially if your school is funded by the public. That “free internet and power” is paid by someone, and if it’s the public, it’s kind of a dick move.
They can’t see what’s in your ssh or VPN tunnels necessarily, but they can usually see where the packets are originating from and going to. So if you’re say, accessing it from home directly to the server via VPN or SSH, if you’re not doing so using a full VPN service like Mull, they’ll be able to see the origin IP of your SSH or VPN handshakes, and thus your home IP.
Eh, Nintendo copyright striking switch emulators right before this release makes me wonder if Switch 2 games can be emulated in the same fashion. If so, then that leaves mainly online multiplayer games that can’t be played, and online switch games are not a great experience.