How does the fact that there have been no or few casualties on heritage railways suggest that their safety cases are too draconian? How many injuries are acceptable? Where do you draw the line? (I think a similar question was asked at the beginning of this thread). I'm not sure how you can infer that photographers who can afford their hobby would have the relevant knowledge/common sense. In fact, I think over-confidence and an "I don't need to bother with this" attitude has been a factor in various incidents.