Do I have a moral responsibility, especially if I'm certain someone's life may be in danger?
I can only answer these questions for myself, in both cases I'd say YES, especially if I'm certain someone's life may be in danger.
Now, if I only suspect someone's life may be in danger do I have that same responsibility? That's a tough one. People get angry all the time and wish someone else ill will. They also "get over it" and their more rational side prevails and nothing happens. Do we destroy people's lives by turning them in for "venting" and simply wishing someone ill-will?
Not a rat hole I want to go down.
I can tell you that Adam Lanza (the Sandy Hook shooter in Newtown, CT) appeared to display all the warning signs and his own mother knew he was a danger, yet failed to lock up her own weapons to prevent him for accessing them. Should she have been held liable? I said yes then and my answer is an unequivocal yes now.
Still, that case proved all the gun laws in the world wasn't going to stop what happened at Sandy Hook. The problem isn't the weapons despite what liberals want to believe, the problem is evil exists in this world and good people should by all Constitutional and God given rights be able to defend themselves from it.
it's kinda like this cartoon:
And the above is exactly why we have the Second Amendment. A point which is routinely and consistently lost on liberals.