About the only one that could be called controversial would be Wayne (later Jayne) County and The Electric Chairs at Reading, somewhen in the Eighties. A very muddy gig, Wayne got halfway through the second song, 'If You Dont Wanna **** Me, **** Off', when the storm of clods of mud, bottles and cans drove them off stage, while roadies dragged plastic sheets over the Doobie Bros kit to protect it. Took them half an hour to shovel the mess off the stage. I thought it was hilarious, the band were bloody awful.