This is off topic, but the actual story behind the M&M's thing is interesting. The band didn't actually care if they had brown/green/whatever M&M's in their dressing room, but they had that provision buried in their touring contracts to see if the promoters were actually reading/following the contracts and setting up the venue to the band's requirements.
The band always knew that if they had a bowl of M&M's with the offending-colored ones left in, they needed to have their roadies thoroughly check the set-up so make sure it was correct and the music/stage show would come across to the audience as intended.