You did very well tyguy808 and many would do well to follow in your foot steps here.
The reasoning behind this is that many will just write it off as nothing or none of their business or do not want to be seen as calling 911 needlessly.
A friend of mine told me of an incident a few weeks ago where he saw 3 kids messing around the front of his neighbors house and walked over and the kids left, he look a little closer and see the front door was slightly open and went back home thinking the owner or their kid was home.
Later to find out the door was adjar because they broke in and had stolen a few items and the kids bike was in the front room with her purse was by the front door as well.
The owner and kid was home in bed!
Unfortunately no call was made and the 3 kids got away clean.
Again good job, even if it is a false alarm make that call.