It shouldn't reflect on airsoft at all. This crime was committed with real steel, not airsoft. It oinly shows he had an obsession for airsoft hardware. People are becoming too lazy for securing their firearms. Obviously the kid knew either the combination to the lock or knew where his parents kept they key(s). I myself have firearms and my kids do know what's inside, but I keep the keys out of sight and won't have them near by when I go to retrieve them. That way, they don't know the location of the keys.
For future reference, topics like this should be placed either in the "General" or "NAR" section.