I recall reading that the "no brown M&M's" clause was added after a near-fatal accident on stage where a member of the Van Halen band got electrocuted because of bad wiring on the stage.
Just a friendly FYI: "electrocuted" implies a fatality. (I learned this similarly on an internet forum I posted the word to years ago.)
"Electrocution" is a portmanteau of "electrical execution", which not only implies that the person died, but that it was intentional and sanctioned. Lack of a better word has expanded usage to any death caused by electrical current.