Ask HN: Reading list / identity verification

Kindle Owners’ Lending Library has made me want to sign up for Prime but I have commitment phobia with only having one free book per month.

I want to choose my book based on HN reviews/rankings. I see occasional reading list posts here but haven't linked the two together. It'd be cool to see what others are reading. I'm looking for something beyond the commonly suggested entrepreneurship books. Something with adventure, a life lesson, or otherwise would make me a more well-rounded person.

The second part of the idea is how to keep spammers out and encourage high quality lists. The app could require some karma minimum or age of account on HN or other sites.

It would be authenticated by temporarily putting a unique identifier on your profile while creating your account on the other site.

Questions:

1.) Would a HN reading list app be welcomed by others? Especially if it ties in what's available on gutenberg, amazon prime, etc. Some notion of karma or cross-linked HN submissions. Like instantwatcher in some ways...

2.) Does a identity/credibility verification system like that already exist?