I once saw a documentary about current permanent staff of a German concentration camp. They had an extremely fast turnover and one of the jobs which was particularly unwanted was turning off the lights in the evening, certainly in winter. It involved a last round to see whether everyone was out. One of those guys had been there 10 years and told the makers of the documentary that there had been suicides, drinking problems, depression and what have you amongst permamenent staff members. All of them.
They did do things pretty to-the-point though. A guided tour took visitors to the showers where the guide crammed a group into it of about 50 people like sardines in a tin, then asked one visitor to close the door and then told them that that was how things happened in the gas chamber... Dead silence.
If you have to do that every day, look at the permanent exhibition photos every day... indeed I think you go round the bend if you are normal in any way.



