Before Stack Overflow, the savvy knew that this was a great way to get help with anything Unix-related. If you just went to Usenet or mailing lists and asked "how do I X?", you'd be pummeled by uppity greybeards going "RTFM, n00b". Ah, but if you created a sockpuppet and posted the wrong answer in reply to your question, then you'd be guaranteed to get useful advice.
[0] https://en.wikipedia.org/wiki/Ward_Cunningham#Cunningham.27s...
I've gotten some great information on forums like this doing exactly that. I usually pose it as a challenging assertion or question rather than a statement of a fact I'm sure about. Gotta balance using that for it's benefit vs effects on one's own reliability.
[1] Which is what happens after an event it then seems as if someone should have known in advance it could have happened the way that it did and taken steps to prevent it from happening the way that it did.
But actually, that could be a great content authoring strategy: create a really good, smart name for yourself. write articles that the smart people of the internet like to read. give them the wrong answer, they will be forced to correct you. collect replies(including those from you your closed forum) and grab the right answer. publish and charge.
Don't know if that's the strategy. But it could work.