Good idea. Would it be possible to just tag the bad nodes, i.e. <div ... class="badnode">, when logged in? That would allow to customise the appearance individually using CSS.

EDIT: Thus, censorship or not is kept an individual decision.
Suggestion for default CSS: Don't hide and don't mark.
Offer sample CSS or a configuration item in Display Settings, i.e. .badnode:before{ content: "Disputed: " }

If it is acceptable to just hide the content from AM (it's still in the source HTML), tagging might be good enough to reduce the implementation workload to just tagging plus CSS. However, search engines (and notorious HTML source readers) might still find bad nodes. Not sure if this is an issue, though.