I'll start by saying that I make NO judgement about the wholesomeness of the acts that are scheduled to perform at MGM, or anywhere else for that matter.
I just picked one of your "favorites" at random and looked at their entertainment schedule. As for "fairly obscene", have you ever seen George Carlin? (I have) Does it only become offensive enough to boycott a property when the "fairly obscene" is commemorated with a chip release?

Best Regards,
Murph

Below is a partial listing of upcoming shows at MGM Grand:

VH1 Divas Duets
May 22, 2003
Tickets - $175, $125, $60
Tickets on sale now

Pearl Jam
June 6, 2003
Tickets - $35
Tickets on sale now

Justin Timberlake & Christina Aguilera
June 21, 2003
Tickets - $98, $78 and $48
Tickets on sale now

Fleetwood Mac
July 5, 2003
Tickets - $250, $125, $85
Tickets on sale now

Dixie Chicks
July 26, 2003
Tickets - $100, $75 and $55
Tickets on sale now

Dixie Chicks
July 27, 2003
Tickets - $100, $75 and $55

George Carlin
May 22 - June 4
Tickets - $60 including tax and handling fee
Show at 9pm

Carrot Top
June 26 - July 9
Tickets - $35 including tax and handling fee
Shows at 9pm, Saturday 7:30pm/10pm