Have you tried this?

In the User CP, go down to "Edit Options"

Then, about 1/4 of the page down, look for "Default Thread Subscription Mode"

Set it to "No e-mail notification".

Now everytime someone replies to a threaf that you create, or post in...it will be displayed in your User CP.

Now if you have some that you don't want to follow-up on, just un-subscribe them.