This doesn't work because unlagged causes enemies to die while your follow up shots (ones you fire not knowing you've basically already killed the enemy) are still "in the air", especially for high pingers. Of course this is more in relation to lasguns, chainguns, and rifles, but the example is that you have 150 ping, you shoot at a lisk, it appears to die, but then a bunch of shots you fired after the lisk's fake death was sealed make contact with it, doing the extra damage suggested, probably revealing it, and most likely killing it.