Of course companies wanted people to share the free demo versions but some full games did have annoying protection schemes in the '80s. Obfuscated data and purposely “bad” sectors on floppy; cardboard decoder wheels; asking for word #x from line #y of page #z of the game’s manual, or, similarly, a page of codes printed in black ink on dark maroon paper to prevent photocopying… leading to folks distributing cracked versions and the cracking tools themselves!

To be fair, it was a pretty ridiculous time. Computer club meetings just turned into floppy-copy-fests.