The rants in this thread are pretty entertaining.

There's a HUGE difference between (1) a bunch of supervised kids in the hotel using the facilities; (2) a large number of unsupervised kids abusing the facilities; and (3) a bunch of loud, obnoxious people of any age screaming in the hallway and slamming doors at 2 a.m.

#1 is fine, though some people find it annoying at times. In the RI example I referenced, the kids completely took over the pool, the sportscourt, and the breakfast area, simply due to their sheer numbers. I'm sure that some of the adult guests were annoyed, but the kids were supervised and didn't act inappropriately.

#2 and #3 are unacceptable, abusive behavior.