Well, you have a source and I’m clearly in the wrong here. I have heard double tap used in infantry tactics, unfortunately not for paintball though I have played. Shooting an already out player is a no-no in paintball too. But, potentially the usage in infantry tactics was a deliberate attempt to muddy the waters on the legality of the, even from that snippet, much more reprehensible ‘double tap strike.’
I’ll keep this information in mind, specifically in this case.
EDIT: There’s a source for this - I am incorrect. Potentially a homonym situation.
Original: I would like a source on that.
To be crass, you double tap an enemy who is wounded as you’re advancing past them so you don’t need to waste time or resources securing or treating them.
If you’re far enough away that they’re wounded and their buddy is rushing over, well, they should’ve done the first rule of care under fire - return fire. Not my fault if they forgot to call time out. That’s not a double tap.
KFC in South Korea was the worst KFC I’ve had in my life… but it wasn’t the worst experience.