Maybe BFR's that consist less of honing the skillz your PPL "thinks" he has and a bit more of a reality check would work...
Rent a plane that Is IFR capable and pull him into the clouds. No foggles. REAL. Climbs. Decents. A 180* get the hell out turn. As he loses control for the third time admonish him that he and any friends or loved ones he had been flying with would be dead due to HIS ego.
Some people need to have the holy crap scared out of 'em to convince them they're not as smart as they think they are.

My wife of a few months was a smoker. She developed pneumonia and didn't tell me. I came home to find her in the pyramid position in bed and gasping for breath. To the ER we went. Long story short; the docs told her that if she kept smoking she would most likely end her days feeling that same way she did that day in bed; unable to draw a breath no matter how much she tried.
She never smoked another cigerette. Ever. No patch, No support Group. Simply Scared Straight.

When you pass your FAA PPL you need to display a modicum of IR capability (climb. dive. recovery) but in the back of your mind you know you won't be allowed to die. For some people this doesn't equate to a future danger.

If I were re-writing the FAR's i would make sure EVERY student got REAL IFR exposure for a couple of hours. Foggles are a video game. Real IMC not so much.


Chris

Besides; look how many training flights could occur...after all, when going after a PPL the weather is crappy 1/2 the time...