The biggest challenge isn't making this information available to newbies, but to have them listen to it. Newbies and veterans can both be very stubborn for different reasons. Sometimes it takes a massive mistake to make one humble enough to except new ideas.
Put yourself in the newb's position. What if some random guy walked up to you and started pointing out flaws in your riding technique? Would you be humble and listen? Or would you think you knew what you were doing and brush him off? What can this guy know about riding? I've been riding for decades right?
I think young riders have bad role models. It's either the stunter type with the ICON vest and mohawk helmet. Or the sleeveless leather vest Harley guy with arm fat flapping in the wind. Yes, there are responsible newbs. But most people only listen to people they admire and respect. Australia has gotten the right idea with their PSA's.