Not a more civilized society. Just a time when the number of people with access to the internet (and thus the whois database) numbered in the hundreds and not the billions.
And i don't mean to imply that the computer scientists of yesteryear were somehow more honest people. It's just a lot less likely for someone to cheat in a group of a few hundred, where everyone is at most one degree of social separation from everyone else, and everyone is in any case very similar in background. Harder to screw over someone you see at all the conferences than some random stranger online, and if you do there will be social, not just legal, consequences.