There is no excuse for this--none. Nor is there any for this. No "necessity" defense applies here. If people behave like jackals, then they should be treated like them.
The Romans had a saying: "What do civilized men owe barbarians? Nothing."
Make no mistake: people who need to be--and could be--rescued are going to die because personnel have to be diverted from search and rescue missions to put down scumbags trying to feast on the corpse of a city. If that's the way they want it--fine. Let them have it--at a muzzle velocity of 3000 feet per second.
Let me paraphrase the Romans: "What do civilized men owe people getting their rocks off by potshotting rescue helicopters and terrorizing a children's hospital?"
You fill in the blank.