Unfortunately, until someone can find a cure for the, "It'll never happen to me" mentality, this will always be a problem. Look at how many people still don't wear seatbelts in cars, that drink and drive or that try to write texts on a mobile whilst doing 90mph up the motorway. As they say, you can take the horse to water....
However, I do think LRH's idea is a good one and easily acheivable. After all, the airline I work for has been known to let out the training facilities to "office bonding" groups, so why not frequent flyers? My only worry would be that the people that would have enough of an interest to attend one of these courses are not generally the sort of people that ignore the safety briefing anyway.