[BreakDriFT]

pawn Code:

new Bots[MAX_PLAYER_NAME];
    GetPlayerName(playerid, Bots, MAX_PLAYER_NAME);
    if(!strcmp("con", Bots, true) || !strcmp("aux", Bots, true) || !strcmp("prn", Bots, true))
{
    SetPlayerName(playerid, "TomaPiranha"), SendClientMessage(playerid, -1,"Mais uma Piranha banida uhul.");
    Ban(playerid);
    return true;
}

Tenta ae coloque no seu gm onplayerconnect , e entre com nick bot .