ZeroNet killer application: browser addon to comment any newspaper / website

Many news papers have closed their comment sections for various reasons.
- lack of manpower for moderation
- legal risk
- unwillingness to accept opposing views
- trolling / spam / etc.

ZeroNet could help out with this. With a standalone browser addon (for major browsers). Such an add-on could inject extra html at the end of any website. If there is no comment section (lets say in some news article) or if the comment section is censored, the addon could append an artificial comment section, one that cannot be censored.