This was already made. SkyEye. It's a horrible idea and uses client sided player positioning. Letting people know how to client-sidedly get position leads to aimbots, and someone who isn't great at scripting definitely wouldn't know it anyway.
It would require the ability to get each player's position without being the host, and that is how people make aimbots and wallhacks.
...you do understand that the illegality of an aimbot is due to its use, and not because it exists, right?
There are people that know how to make them and don't because it's immoral.
Another thing you should understand is that this guy wanted simple requests. I don't actually need such a simple thing.