gistfile1.txt

    private static Text text = Text.builder().color(TextColors.GRAY).append(Text.of("Please reconsider your usage of the All Caps Rage.")).build();

    public void onPlayerChat(MessageChannelEvent.Chat event) {
        Optional<Player> player = event.getCause().first(Player.class);

        if(player.isPresent()) {
            Stream<Character> stream = event.getRawMessage().toPlain().chars().mapToObj(i -> (char)i);

            if(stream.filter(c -> Character.isUpperCase(c)).count()/stream.count() > 0.5) {
                player.get().sendMessage(text);
                event.setMessageCancelled(true);
            }
        }
    }
}