How could I do a sanity check for mouse.Hit.Position?

I will just throw an example rather than copying my code, because it is more just brainstorming on how I would go about this anyway.

-- Client
local pos = game.Players.PlayerName.Character.Head.Position
remote:FireServer(pos)

-- Server
remote.OnServerEvent:Connect(function(player, pos)

-- some sort of sanity check here, to make sure they aren't firing through player's heads
end)

I thought about checking if the pos was a player's head position, but that could be slightly off b/c of lag. My other idea was checking if they are sending through the same exact value, but again, if a player is moving that wouldn't matter. I am just stuck and not sure what to do, since aimbotting would be quite the issue for my gun game. Any ideas will be appreciated!