Kicks the player for using a minigun.
[pawn]
public OnPlayerDeath(playerid, killerid, reason)
{
    if(reason == 33)
    {
        new szMsg[76], name[24];
        GetPlayerName(killerid, name, sizeof(name));
        format(szMsg, sizeof(szMsg), "[Auto-Kick] Kicking %s for using a minigun.", name);
        SendClientMessageToAll(0xFFFF00AA, szMsg);
        Kick(killerid);
        return 1;
    }
}
[/pawn]
You can replace Kick(killerid) with Ban(killerid) to ban them. Then you have to change the format() message so it says Banning instead of Kicking.