If someone sends you a bunch of texts in quick succession, it can be really annoying to have the notification sound repeatedly play...especially when driving, working, or listening to music.

It'd be nice to have an option to suppress multiple notifications for the same conversation if I've not checked it yet. Something similar to "Send me notifications for conversations I've not looked at a maximum of once per minute" with different time interval options (e.g., once per 30 seconds, once per minute, once per 5 minutes, once per 10 minutes).