Wow man, that's seriously cold. The poor guy is lashing out because he has nowhere to go. You sounds like the kind of chap who would walk up to a guy that lost his legs in Afghanistan dancing around him telling him he shouldn't really be surprised because there's folk that get blown up there every day.
No Dan,
You have that very wrong, my attitude would be total sympathy and support if the guy had lost his legs because no one had told him the area was bobby trapped. However if there were signs up saying beware you might get blown up if you walk over there, and the man was annoyed that a load of other people had not walked through the minefield with him to protect his legs then I would show little sympathy.
Even less sympathy if he then attacked the group who put the sign up, claiming it had stopped others getting their legs blown off and as a result he had been more liable to injury.