Maybe you can encourage him to leave... tell Soundman that he has to get dressed up for the job. Leather cycling shorts and a chainmail shirt with SM (for SoundMan of course) written on it... maybe one of those Village People hats and a stick on moustache too. He also has to stand in the front row close to any potential moshing and take abuse from the band in the form of beer bottles and glass ashtrays hurled from the stage (all part of the live 'show' of course) :D