I agree, but it's pretty easy to get all my comments out of HN anyway, because I have a dedicated account here. It's more useful for distributed content on site

I agree, but it's pretty easy to get all my comments out of HN anyway, because I have a dedicated account here. It's more useful for distributed content on sites where I just post one or two comments. In a second step it would be pretty simple for HN or any other site to just give me a field to enter my personal tag and add it to every comment (maybe in grey behind the username).