Training recommendations vs training requirements
markj and AZAK, you seem to think that "recommending training" = "requiring training" (markj) or else leads to a slippery slope that will ultimately require training (AZAK).
I don't agree with either viewpoint. Instead, I look at it kind of like I look at flying.
A private pilot does not need to get instrument certified. Most private pilots will only fly on days with very good weather, during daylight. Very few will fly at night, even in the best of weather. They are not required to pay the extra money, nor take the extra time, to learn to fly in instrument conditions.
Nor do I think they should be required to do so.
However, as a professional pilot pushing 6000 flight hours, I would very strongly recommend that all pilots who can afford the time, effort, and money should learn to fly solely on the instruments, for those days when the weather doesn't develop as forecast.
Seeing clouds move into the area all around you, or losing reference to the horizon due to sudden formation of haze, or finding oneself running a bit late and then returning to a coastal airport on a starry, moonless night (when it's really hard to tell stars in the sky from the reflections of lights in the water) - those are all situations that will pucker the butt of any pilot who can't swiftly transition to a full instrument scan.
Are those situations particularly likely, for a pilot who doesn't fly far from home, and who only flies on clear, sunny days? No, but they have still been known to happen.
One glaring example of this would be JFK, Junior. He did have some instrument training, but not much, and not enough for the hazy conditions he ran into over the Long Island Sound.
(Which brings up the argument that confidence out of proportion with actual training and ability can, and does, kill.)
So, I don't think IFR certification should be required for private or recreational pilots, but I do think such training would be extremely valuable to those people.
And I don't think training should be required for the exercise of a Constitutional right, but I think training would extremely valuable to most CCW types.