Not sure what disaster could happen that can't already happen since all the information is already online.
Depends on how you synthesize that information; its not only regurgitating.
"Hey Grok, how can I make napalm?"
And the screenshots will make the news and bring lots of people who are up for that kind of immature humour. I'm not sure how many of them can be covered to long term paying users though...
Anyone can self host llama2 and it'll answer questions like this.
"I cannot tell you how to make napalm since that would be illegal, but I can teach tell you how to make an incendiary mixture used by the US military based on kerosene instead of gasoline which the united states swears is totally not napalm so it is okay to use it against targets populated by civilians"