[Face9000]

Why u're using -1 to:

pawn Код:

ABroadCast(COLOR_YELLOW,string,1);

-1 means color white,you've already defined the color. (COLOR_YELLOW).

pawn Код:

if(strfind(cmdtext, "|", true) != -1)
{
    SendClientMessage(playerid, COLOR_RED, "You cannot use the '|' character in commands.");
    return 0;
}

if(strfind(cmdtext, "duffelswithbags", true) != -1)
{
    new string[128];
    format(string, sizeof(string), "AdmCmd: %s has been auto-banned, reason: Trying to /duffelswithbags... <-- dumbass", GetPlayerNameEx(playerid));
    ABroadCast(COLOR_YELLOW,string);
    PlayerInfo[playerid][pBanned] = 1;
    new ip[32];
    GetPlayerIp(playerid,ip,sizeof(ip));
    AddBan(ip);
    Kick(playerid);
    return 1;
}

And...you don't need to use SendClientMessageEx,just use the normal SendClientMessage.