The world pretty much fell over themselves thinking how awesome the ‘deny’, ‘defend’, ‘depose’ was, so I’m not particularly surprised everyone that follows through with sniping tries to imitate that in some way. It’s a way for the shooter to tap into being as important and significant as Luigi has been in popular culture. Or in this case, it might have been ‘ironic’ as a supremely broken 4-chan edge-lord thinking they are going out of the world doing the ultimate troll.