I think you will find that in Europe and Asia demo teams DO shoot flares at Airshows, although the ones posted by Gyrob were taken on Donna Nook range
some great pics in this thread
In that case I stand corrected, I have never seen it myself in Europe and I cannot comment about Asia.
I have been on the other end so to speak, over Donna Nook doing just that!
Echo your comments about the great photos on the thread.