It's all very scary.
Enhanced mode S means, I think, that the transponder tells ATC what you've set on your autopilot, your mag track, number of Pax, number of hot meals left on board, hostie's telephone number, and so on.
That means a "glass cockpit" to feed the Mode S. That's going to look very odd on Tiger Moths and the like, isn't it.
I can understand that if I want to fly IFR in Class A airspace in 2010, I'm likely to need enhanced Mode S. I don't like it, but I can understand it.
For everything else, and up to (say) 10,000 feet, surely common sense should prevail. I would like to see our CAA telling Eurowhatever not to be so silly, and to change the rules they've just dreamed up without use of brain.
An "exemption" is NOT a good idea. Those have a habit of being withdrawn, and anyway don't work elsewhere.
Where is AOPA? Not heard a lot from that quarter about what's being done... Should we all write in to say our views, or will that drown the CAA in conflicting arguments, leaving the "do nothing" option as the best one?