I played guitar with avril lavigne (no idea why, can't stand the woman) and have played guitar with my unborn son. Strangely, also played guitar with the devil.
Now, fully expecting flames here, but here goes anyway! I hope more people DO learn to lucid, and get really good at it because then they will realise they can live their "perfect" lives in dreams, and do the mundane stuff in the real world. Personally, in my dreams I am an awesome guitarist (I suck in real life) and I am ridiculously rich in the dream world (I do ok in real life). So what else could I want in the real life? I have a beautiful girlfriend in the real world, and any woman I want in the dream world. PLUS, I can leap off 9 storey buildings and land safely in the dream world, something I could never do in the real world.
My opinion is that if more people could lucid dream, then people would be more chilled out and less obsessed with material posessions. And remember, a LOT of wars, fights and other troubles are over what people want. Once you can have whatever you want in the dream world, stuff in the real world becomes irrelevant...