I think we just asses the situation, tell our children the truth. Wow didn't know that about RFK Jr. Let's not forget the My Pillow Guy...
Content moderation is made harder when official policy is tweeted instead of delivered through proper channels.
Now as for "an effective way to teach users that they are sharing false information, rather than simply banning them?". You have to realize that some users are using comedy where appropriate, while others just say inappropiate things that are funny. Either way, too much censoring and you effectively tweet yourself out of the platform..
Re: A missed opportunity
I wouldn't say predatory. Those systems are there to sell. At the end of the day, I would check the games my kid wanted to download. If it contained in app purchases, I would tell them "do not press that or else.." to let them know it would charge us money. Eventually they pickup on what's free and not, and well, then at that point you get "can you buy me this?". Lol like I said, there to sell :-P