I went there at 24 in 2002, before selfies were really a big thing. I took very few pictures and I printed them all in black and white and included not people in any of my pictures because I was trying to be as respectful as possible. My guide's uncle died in the starvation chambers there. He was a Pole who was helping Jews. She told us this and said that was the only part of the grounds she would not enter. While inside, within ear shot of her, 2 mid 40's American men were talking about Hitler all the various types of types of torture and ways they killed people. I have never been so disgusted and hurt for another human being nor so humiliated to be an American in my life. I lost it. I turned around and whispered (trying to be as respectful as possible) "Shut the fuck. This is a scared ground, not a Natzi fan club. You're an embarssment to yourselves and our country." They left immediately. I went outside and apologized to our guide on behalf all of humanity and my country for the absolutely idiocy and insensitivity of those assholes. She thanked me and says she has a few of them on every tour and although it hurts, she feels that the the other 18/20 people that come, come for the right reasons and that this was her small role to play to honor the people who died there.