One thing I like about Berlin is that some clubs explicitly forbid photos. Staff place stickers on the front and back cameras when you enter. Anyone spotted taking photos is kicked out.
Definitely, don't know why not more places are like that. The majority if techno clubs does it.
There is a reason more clubs are also dark etc.. not only to hide the maybe existing wasted faces, but also to completely let go and dissolve in the music, this is very necessary.