I'm subscribed to HN Notify, and personally, while I admit I sometimes use it to carry on unproductive arguments, I also often get replies that are positive or

I'm subscribed to HN Notify, and personally, while I admit I sometimes use it to carry on unproductive arguments, I also often get replies that are positive or neutral in tone and contribute more information to the discussion; since they're replies to me and to whatever specific point I commented on, I'm generally interested in reading them even if the version of the entire discussion I originally read did a decent job of covering the topic. (Actually, scrolling through a list of my HN Notify emails, it seems non-negative replies are by far the most common case. I don't remember them as such, probably because involved arguments stand out more than random bits of discussion.) Therefore, I'm glad to have the service, and I'm skeptical that it would really be so bad to give it to users who aren't savvy enough to know that HN Notify exists.