Umphrey's McGee, rocks! Too Bad about their fans

I am a huge fan of Umphrey's McGee (UM).  I believe they are extremely talented musicians, actually as I tell friends, probably some of the most proficient lives acts I have ever seen.  I like some bands better, but don't think that they are as talented as UM.

That being said, I think I've seen my last UM show for quite some time.  Heading into NYC to catch them with STS9 at the Roseland Ballroom, I walked in halfway through the STS9 set to a PACKED HOUSE.  Looking at my buddy, I knew it was going to be tough getting up front in the mass of humanity.  Then upon closer inspection, it seemed like I walked into a prepubescent high school kegger.  All around where 16-17 year old kids, with their worn out Grateful Dead and Phish shirts.  Really? Where they jamming and hanging out in the lots before and after the shows back before Jerry died or Trey splitting up the band?
The other half of the kids with their dopey rave gear, at least they were ready to dance.  As I expected when STS9 was done, the floor emptied out enough for me to try to get to the rail.  Making my way, I noticed an recent occurance that I see at many of these under 21 shows, not just UM either, but groups of these kids sitting on the floor.  Sitting on the floor, that's like crying in baseball.  It drives me nuts, why can't these people stand and wait for the band?  They had to stand the entire 90 minute set, that if they don't rest their young legs, they would fall over?  Perhaps it's growing pains that force them to sit.  And don't get me started on how they can't handle their high.
Whether it be using their newly forged fake ID, that get's them drunk, or trippin' on E, 'shrooms or acid.  They fall all over themselves, searching for their friends instead of paying attention to the fuckin' band.  They'd be better to stand outside and sit on the curb and bullshit, so that the fans can enjoy themselves.  I mean how much weed can you smoke during a show.  At Roseland, I watched some kids smoking as long as the music was being played, so concerned that they felt it was their obligation to inhale while the band was playing.  Unfreakin real.
Hey it's not that I am old, 35 is certainly not over the hill, nor am I some AA freak, trying to clean shows up, but there is a fine line. 
I do see the same shit at moe. shows, widespread panic, mule, everywhere, but never so prevalent than at UM shows.  It makes sense, they are younger musicians than many of the other bands I go see and it's too bad.
I look forward to the next time that I see Umphrey's again but it may be a while, unless they tell the kids they need to stay home or play a venue that is 21 and over.

-Peace