As supremely annoying as it is to deal with, Darwinism for humans invovles helping out the slowest, dumbest, ugliest member of the clan/city/civilization because that might be the guy who accidentally bangs two rocks together and cuts himself on the resulting edge, or who's kid invents the polio vaccine. We're a species which passes most of the important information by language and less by genetics. We no longer benefit from these people dying in a fire so the "Fire=Bad" gene wins over the "Home=Good" gene. So I say, find some way to punish them if their actions endangered firefighters or destroyed property. But as satisfying as it would be for those people to burn to death or suffocate in the smoke, unfortunately we're really not benefited as humans by allowing that to happen.