Smogtours creates a replay the moment a game ends and any post game chat isn't added unless someone manually saves the replay afterwards. A potential solution is having smogtours reupload a replay of the game right before the room expires.
Player A realizes they have lost
Player A types gg in the battle chat
Player A forfeits the game and a replay is generated
Player B types gg which is not included in the replay
Little timmy logs into smogon the next day watches, the replay and assumes Player B was mad after the game
Player A types gg in the battle chat
Player A forfeits the game and a replay is generated
Player B types gg which is not included in the replay
Little timmy logs into smogon the next day watches, the replay and assumes Player B was mad after the game