I've done a lot of browsing of the web over the last couple centuries, and yet never before encountered a warning that "Your setting(cookies) prevents you from making a comment. Click here for explanation..."
My setting (Safari) is chronically "Accept cookies: Only from sites I visit (block cookies from third parties and advertisers)"
I noticed this phenomenon when browsing
UI 2.0 – Emotional Software on the iPad | Broadersheet iPhone Edition
I actually had no plan to comment, but the highlighted alert caught my attention. It seems to involve use of some "Disqus" comment system. I've never even observed such an issue, even with OpenID-based systems.
Any thoughts about Disqus, value of various cookie settings, whether I should I should "just relax and enjoy a more liberal cookie policy" in my browsers?