When my wife and I toured the Chivas Brothers' Stratisla Distillery in Keith last year they asked us not to take photographs inside. Oddly the reason given had nothing to do with protecting proprietary processes, that I would have understood. Rather it had to do with the possible hazard of flash setting off alcohol vapors! Now off hand I don't know the flash point etc of ethyl alcohol vapors, but it seemed to me you'd be getting pretty intoxicated well before vapor concentration got to where it could flash over. Plus their switching gear and electrical motors didn't look especially explosion proof. Great tour by the way and I brought back a bottle of their cask strength single malt that I'm carefully husbanding as they don't export it to the U.S.
David