[Slice]

OnPlayerGiveDamage is called when a player shoots another player *on their screen*, right? If someone is running around you in circles and you shoot ahead of the player you will hit him, but only *on his screen* (i.e. you won't see blood come out, but he'll lose damage).
Not only that, but if it were a 1-shot kill, and the shooter would be lagging, then the player that were shot will get kicked because the shooter didn't report to OnPlayerGiveDamage before the player that was shot reported OnPlayerDeath.