ahh you are so right Trex, alas, you can lead a horse to water, but you can't make it listen to decent music...er...something like that.
I agree that not responding is generally the most effective way of dealing with adolescent tendencies in the male of the species (I live with 3 boys-all musicians) but in this case, my not responding is lessened by the egging-each-other-on...this seems to be what keeps it going, the let's-see-who-can-say-the-most-innapropriate-thing...and it's so childish that it gets to me...
On a positive note, I don't want to jinx it- but I may have landed a role in a movie! (not talking, dancing-well, sort of) I'll write more details when I know for sure...fingers crossed!