To echo some previous posters, please do not equate what Florida man did to typical gun owner behavior.
As for my two cents, unfortunately we live in a world where you HAVE to be suspicious at stuff like this, generally speaking, people of any age hanging out near/on your property at 1:30AM is not normal and as a resident of the home you should be highly suspicious especially if you hear them saying stuff like "did you get anything"?
There are so many crazy people, robbers, rapists, murderers, to say otherwise is non-sense and I'm highly disturbed at all these comments outright demonizing Florida man's actions, he had every right to be afraid.
All that being said, he didn't handle things properly, he should have gone outside WITH his gun to see what was up, but immediately holstered it upon seeing it was just some kids playing Pokemon. Also no need to shoot them if they were unarmed and not even on his property, should have just asked what they were doing, and left it alone.
The vast majority of responsible gun owners would not have acted so carelessly, and it sucks that crazy people like him are what give gun owners the horrible image they have.
Also, regardless of what your opinion is, you must all admit that people should NOT be going near other people's houses unless they have some kind of a problem (broke down, lost, medical emergency etc...) and the teens should have known better. Go to a public park, wal-mart parking lot, heck I'm okay with going in a field or the woods. Just don't go near people's houses, you run the risk of getting shot by crazy people like Florida Man.