Sounds like a good idea though.
If you have too many threads that you have commented, all you would have to do is turn off the email notifications. But if you have few or you have few active at any one time, the emails would be very helpful.
I am not sure if there is a feature that can also turn off any and all notifications regarding a specific post? Is there? Like when you are no longer interested in the topic of the post because the persons are discussing something else.
Or.... is there a way for the originator to "close" a post to more comments? ... because the issue has been resolved to their satisfaction and you do not want any more comments?
Just wondering...