Words are inadequate

I'm fine with Facebook's [ever-changing] interface (mostly), and I sincerely wish that FB would offer the option to opt-in and/or opt-out of comment notifications for a particular discussion, yes--without manually deleting any comments I've made in the thread, which is the current alternative.

@replies do work, but they offer no threading--it's akin to a public megaphone conversation--and limited, as always, to 140 characters. (I think this comment alone is 2-3 times that.)