The mistake they made was allowing visitors to trigger the generation of articles via visiting any arbitrary URL.
A more resilient concept would have been, have a few "seed" articles in place, and then only allow for the creation of new articles by clicking a link in an existing article.
I vaguely remember a game someone made up (probably on 4chan) where the goal was to click "random article" and see how many clicks it takes to get to Hitler's page. I remember it being fun AND informative.
It was so refreshing and fun for a few hours!