For a while I had one of the DEC VAXes in my collection attached to the network identifying itself as KREMVAX (old usenet joke) it was fun watching people try to break into it. (they could as guest, which had the password guest).

It was particularly fun to watch young people who were new to the scene sort of freak out at this weird architecture. Old farts were easy to spot, they would start right away with a 'show dev' or 'set host' to try to move around the network. Kind of like a hacker aquarium.

I was thinking giving any hacking attempt some sort of fake shell access would be a great learning experience, how awesome is it that other people had that thought and made it.