Digital Data https://m.xkcd.com/1683/

There are many TinyMUD logs that were posted on Usenet, still to be found on Google Groups.

However, logging was controversial amongst mudders. It was almost always rude to log a private conversation without knowledge or consent; it was tacky to indiscriminately log while everyone was in the "hangout room" or Rec Room, as it were, and it was also bad form to post logs to Usenet or share them without redacting player names and other things.

But logging was built-in to most clients, and it was possible for server administrators to log (and hypothetically any malware-in-the-middle could log the cleartext, unencrypted TinyMUD TCP streams.) And many nefarious deeds by nasty players were exposed to the light when their logs were posted.