That's a good point.. the feature is on by default for new posters who only have one post and if those of us who come on a lot don't want all the emails, we can just shut it off.
No one's been complaining about it , but it'd be another little "nicety" of the site. I guess the only way to know, Neo, is to turn it back on for awhile and see if it's too much hassle for you to deal with.. if it is, it's not critical to the functioning of the site.