I'm not trying to make excuses for them, but some just become "numb". It's the crying wolf thing. I worked EMS for a while and it's amazing how few "emergencies" I actually went to. I'm sure in an extremely busy urban setting like that they've had 911 calls like that and 99% of time it's BS. Again, it should be treated as an emergency until proven otherwise but many people treat 911 like 411. End pseudo-jaded cynical rant.