I heard a story about (I think it was) the Kapishnitzer Rebbe, who apparently lost his entire family in the Holocaust. After the Holocaust, he was in shul for one of the tokhachas (not sure if Bechukosai or Ki Savo) and he indicated to the baal keriah to read louder. When it finally processed in everyone's head what the Rebbe wanted, they asked him afterwards why he wanted to go against the custom of reading softly.
"I want the Ribbono Shel Olam to hear that all of it has come true. It doesn't need to happen again."
Avi Billet