Disagree. For probably > 95% of people, the benefit of public engagement outweighs the risk of wholly extralegal actors. Having access to legal redress for misuse of their data is a sufficient deterrent.
Moreover, developing these kinds of standards is a first step towards codifying *effective* legal protections for them.
@emc2 @feld @dalias This is getting quite out of sync from the original conversation, but adding one point:
Publicly available content is different from having permission of using it freely. Copyright laws and ethical standards are complex systems of thinking about usage permissions, but publicly available clearly doesn't give others permission for reusing it (in a modified form).