I'm not actually going to loving go out and commit random murder willy nilly, do you think I'm that stupid and heartless?
I don't personally know you or your immediate family and friends. All I know is that talking about school shootings, posing with firearms and you being serious about "How you'd go out" in a fantasy topic is something that should be taken completely seriously.
Saying this stuff is quite literally playing with fire. It can't not be taken seriously, given the United States history with violent shootings. You know as well as I do that what you posted in that thread wasn't the only example of you talking about this, and it's gotten to the point where I'm genuinely concerned that you're being legitimate in your not-so subtle threats.