In my last ranked game https://online-go.com/game/8885641 my opponent flooded the chat with characters and my browser window froze and I lost by timeout. This seems like a big design flaw/bug. Surely moderators can remedy the situation but it makes no sense to manually fix these kind of situations when they come up. Some sort of maximum character limit is needed in the chat input.
Edit: Browser is latest Chrome Version 58.0.3029.110 (64-bit)