[Markiez]

Why not just?

#include <sourcemod>

#pragma semicolon 1

bool Ready;

public void OnPluginStart()
{
	HookEvent( "player_disconnect", Event_Disconnect, EventHookMode_Pre);
	RegConsoleCmd("sm_ready", Cmd_Ready);
}

public Action Cmd_Ready(int client, int args)
{
	Ready = true;
}

public Action Event_Disconnect(Event event, const char[] name, bool dbc)
{
	new client = GetClientOfUserId(GetEventInt(event, "userid"));
	
	if (Ready)
	{
		Ready = false;
		return;
	}
	
	BanClient(client, 1440, BANFLAG_AUTO, "some shit here");
}