I love wading into a controversial topic as much as the next guy, but the sheer volume of email notifications I get when I do makes me reluctant to participate. While some may consider that a side bonus, I think maybe there are others in the SE community who feel the same way.
I do like having a notification system, because oftentimes I'll forget to check back - but is there some kind of middle ground? A once-a-day or weekly digest roundup? Usually, I wind up clicking the "opt-out" link at a certain point - not because I'm not interested in what people have to say, but because I can't keep up with all the deleting.