[Stinged]

Not sure if it will work, but give it a try.
Make a new filterscript and add this:

pawn Код:

public OnPlayerCommandReceived(playerid, cmdtext[])
{
    if (!strcmp(cmdtext, "/yourcommandhere", true))
    {
        SendClientMessage(playerid, 0xFF0000FF, "This command cannot be used.");
        return 0;
    }
    return 1;
}

Replace /yourcommandhere with the command you want to disable.