While looking for a usable reference for the classic joke "Now that's a face for the radio", I came upon the Charleston Post and Courier, and it turns out this newspaper has the most annoying site registration implementation I have ever seen.
Links to the archived stories work - and they are indexed by Google. BUT stories contain a redirect header (or maybe it's script enabled - I didn't bother to look) so that after a few seconds (just enough to read the headline) you're redirected to the registration page. That is actually more annoying than pages that are just not available. It is really, really easy to get and read the pages without running into the registration page, so they are not protecting their content, just alienating surfers.