I strongly suspect that as the build up continues for the Olympics then more use will be made of GPS Jamming techniques. The area warned of in the Notam for tomorrow covers very busy airfields such as Oxford, Sywell and Wellesbourne.
I know that we are supposed to do our planning properly, however time and time again pilots fail. A good example of that would be the RA(T) issues at Silverstone last year that caused the Red Arrows to cancel mid way through the display.
A lot of pilots have become increasingly reliant upon GPS for navigation and have developed a warm and fuzzy feeling for its accuracy and reliability. Skydemon is a great tool for assistance - but does not replace good old fashioned planning. It can fail...