I had a quick look, but can't find a word for people who enjoy disasters - presumably not if they're in the middle of one. Who takes selfies at disasters? Funny enough, I know a man who quite probably would have: I used to work with somebody - a guy in his 40s or early 50s - whose entire annual leave was spent going to see sieges and disasters. He went to Munich when the Olympic Hostage Crisis was happening, and also to the so-called South Molluccan Siege in Amsterdam. It was weird and crass back then, and it's crass and weird now.