I personally cycle accounts on this site for pseudo-privacy reasons. HN does not allow you to delete old comments you made and thus the only way to maintain some semblance of control over my profile and privacy is to periodically switch new accounts. I've been doing this for years now. The only real downside for me is that as a new account you don't have the ability to downvote, which is super annoying but something I've learned to live with.

I'm not saying your idea is bad necessarily but giving another perspective.