[deadowl]

Crowdsourced moderation, like downvote buttons on certain websites, hasn't worked particularly well. Wikipedia probably has the most appropriate moderation model I've come across. I'd mostly be concerned that annotation could become a stalker tool unless services are vetted for moderation.

[JulianMorrison]

Crowdsourced moderation always results in groupthink, without exception. If you don't forcibly specify and ruthlessly enforce the groupthink as something respectful, considerate, reasoned and elevated, then you will get Nazis, and you will turn into Reddit. This is an iron law of the internet.