Haha reminds me of the time I went to JBP. The lady just shout at anyone who uses flash and didnt do anything. Damm pissed as I was taking long exposure and those fellows with flash over exposed my shots and also scared away the owls. Owls if unspooked, will remain still and you can even use 10s exposure to get a sharp photo.
And there is one super famous Flasher who shoot birds that everyone hates.. She use full powered flashes at 10fps.