Thank you for your thoughts - I appreciate this discussion. I think in the beginning it will best work on bigger websites with popular commenting sections and strict editorial policies. Take The Guardian for example. They disable comments very often, moderate them aggressively - I would love to be able to discuss their content on their website without their control.
Another user case is reviews on websites that more savvy users find not trustworthy. Scam websites etc. Being able to read actual user reviews there could be invaluable.