God forbid anything close to what you wrote ever comes to pass for you. I'm guessing you've never actually shot anyone, not as a civilian anyways. The aftermath is at a minimum, a legal nightmare that you want no part of, not unless you're a masochist.
The shooter in every use of deadly force case is looked at closely by the homicide investigatiors and/or prosecutor's office after the incident to see if there's anything for them to be concerned about regarding the shooter, as well as the decedent, to include their social media footprints. The shooter's posting history can play a direct role in deciding how closely they look at them while deciding whether they find that the incident was justified, or not. If anyone thinks that they won't discover their social media activities during that investigation, they should think again. Should you ever be unfortunate enough to be the shooter in a case, it's highly probable that they'll find your above post as well as everything else you've ever posted on every media platform that you've ever posted on & if there's anything about the case that gave them pause concerning your justification in using deadly force, your post & any like it could certainly come back to bite you in your keester.
Making light about using deadly force in the past certainly doesn't help your case in the future when trying to convince the investigating agency that your shooting was unavoidable & 100% on the up & up.
Whether who you shoot does or doesn't die, expect to be sued in civil court where your above post could doom you. In the jurisdictions where you might otherwise be free from civil liability as long as the shooting was deemed justified by the investigating agency, your post could possibly be argued in civil court to substantiate allegations that you were predisposed to shoot their client, then intentionally let him die or allow his injuries to become more severe, since you inferred in your post that you would do so by delaying obtaining him medical care.
Everyone has to be very careful what they put out to the world these days, even when joking, because it stays out there forever & could be used in the future to hang you.