IIRC correctly, Air Commodore Gary Waterfall was the RAF Harrier display pilot a few years back, so I'd have hoped he'd have good experiences of GA and display flying. That said, I'm amazed at the number of times when I've been a spectator on the ground at Duxford or various military airshows and I've heard a GA pilot seeming completely oblivious of the RA(T) that is in existence, requesting permission to route through the overhead etc. Sadly, I do think there are a number of GA flyers who seem unaware of the NOTAM system. Hopefully even they wont miss the Olympic RA(T)'s etc...