Ne OnPlayerDeath alatt változtasd meg a pozícióját, ha dmben van.
OnPlayerSpawnál tedd vissza a dm-be.
[pawn]public OnPlayerSpawn(playerid)
{
    if(Dm[playerid] == 1)
    {
        new rand = random(sizeof(RandomSpawn));
        SetPlayerPos(playerid, RandomSpawn[rand][0], RandomSpawn[rand][1],RandomSpawn[rand][2]);
    }
    return 1;
}
public OnPlayerDeath(playerid, killerid, reason)
{
    SendDeathMessage(killerid, playerid, reason);
    return 1;
}[/pawn]