IIRC, both Witness and Bureaucracy had physical stuff in the box that didn't look like copy protection, but without which it wasn't possible to finish the game - e.g. There was no way to figure out some things in Bureaucracy unless you read the included copy of "Popular Paranoia".
This might not have been such a problem if I had played the Zorks in order, but I bought Zork 3 before Zork 1 because that was what they had in the shop. Otherwise I might have seen the verse in Zork 1:
"Oh ye who go about saying unto each, "Hello sailor", Dost thou know the magnitude of thy sin before the gods?"