Because it's a pretty solemn place... the guide was explaining how men, women, kids were burned - some alive - in these ovens because the Nazis didn't want to waste bullets or spend extra time on corpse disposal, and these middle aged dudes bust out their phones while the guy is talking and start taking pictures of the inside of the ovens with flash.

Maybe you have to have been there. The atmosphere at Auschwitz is incredibly heavy given all the terrible things that happened there. Everyone seemed pretty appalled at these guys' behavior. I was just a teenager, but I was pretty shocked.