[goodguy]

If an untucked jersey is hanging 12" below the waist line then I see it being a problem. If the jersey is short and won't stay tucked in (which I see several schools uniforms that fall into this category) then it's not that big a deal. When play stops the players attempt to tuck the jerseys in and when they start running, jumping, falling, and getting tugged on, the jerseys come back out.

Some uniform companys' jerseys are not as long as others, same with the shorts. Players should be respectful of the referee's request to tuck their jerseys in when asked.