We just returned from the Singature on Tuesday. We stayed there Monday and Sunday night. While we were not subjected to hordes of drunken 22 year olds or the squeals of families of kids, I can easily see how this could occurr. We had a family next door to our room in the suite and it gave my wife and I pause -- if we can hear them then they can hear us, all you lovebirds out there catch my drift? Don't get me wrong, we got over this concern in about 5 minutes, because Vegas is a town for adults so it was their problem - not ours. Truth be told, we really didn't see or hear from these people after seeing them check into their room. But I agree with "identity crisis" review -- they REALLY should not put families and couples in rooms next door to each other.
A DIGRESSION ABOUT FAMILIES WHO BRING KIDS TO VEGAS: Kids are fine and all, but the reality is that my wife and I do not go to Vegas to be around kids, period. We don't want to see them there and I can't stand when families bring their kids there. People, get the hint. The "family-friendly Vegas" experiment is OVER. It didn't work. Why? Because it was scaring away the grown ups. Parents, get the hint: Vegas does not want you there with your kids. There's a ton of other places for children in the Southwestern United States. Go there. Please. And yes, if you were in Vegas last week with your kids and saw some guy giving you a dirty look, that was me.
One more thing, the big difference in our experience from "Identity Crisis" maybe was because was that we were there on a Sunday and Monday in the dead of August (which is exactly when we go to Vegas -- we live in SoCal so we just got in the car and go). If we were there on a Friday or Saturday, I can easily see how our experiences may have been similar.