Or, this day in age, "Oh... a house is being robbed? Is it mine? No? Oh, sucks to be whoever is being robbed..." *goes back to doing whatever they were doing*.Robbery in progress? Lets pull a dozen heavily armed and armored citizens away from their regular jobs and see how fast they get there.
I give them a 1 hour response time at best
If they do go to the scene, it's to watch/be nosy and not to help.
Again, this doesn't describe everybody but is more of a comical extension of what you said.