[Ari]

Create a count in the global scope then plus when they get a kill, if they get a certain amount of kills without taking extensive damage send a warning.

pawn Код:

new aimbot_KillCheck[MAX_PLAYERS];

public OnPlayerDeath(playerid, killerid, reason)
{
    aimbot_KillCheck[killerid] ++;
    return 1;
}

There are no ways to "detect" as of yet, however there are ways (one of them I've listed) to check.