I think the key word here is "uniform" We are not just referring to a "uniform".
We are also referring to "uniform" organization and thus an organization that is "uniform" in appearance. Granted, if a patrol leaders council declares they want the troop to wear tails out, then the whole troop must particpate in this in order for it to be uniform, just like the military with the OG 108 fatigues which were only worn outside on orders when the heat category index reached a certain level.
However, if one notes, in very few or none of scoutings publications do we see the uniform worn untucked. IMYGOD! But it's not in writing!
It seems to me that wearing the uniform untucked is wearing it sloppily, and not presenting a positive image of scouting. If the uniform is going to be worn, it should be worn correctly. How many scouters out there would suggest a scout appear before an eagle board of review with the shirt untucked? Or how about a job interview? For those who say one has nothing to do with the other, they forget that one of the most important fundimentals of scouting is to prepare a scout for life.
As scouting is a uniform organization in the public's eye I believe the uniform should be presented in a positive way.
When I returned from the military to my old troop the wear of the uniform at meetings was almost non-existant, but in the 2+years since nearly all now wear uniforms to meetings, and this has been positively noted by both new scout parents and the parents of the older scouts.
As far as the new uniforms being cut too short is concerned, I`ve noticed that the same scouts that most often did not wear uniforms to meetings in the past were also the ones that would not tuck it in, the key word here being more "individualism" or dare I say protest or even rebellion than uniformity, which may be fine with street clothes since than I would not be forced to have a boys underwear flashed at me above their jeans when an untucked shirt covers it, but as a uniform which is worn with a uniform organization I believe that the adult leaders must work to instil a scouts pride in scouting, in his troop, in his uniform and yes, in himself.