Participation Protocols - Flagged Content

[mattyg]

I think there is an additional pattern for Participation Protocols that doesn't neatly fit into #62, and #63. This is "optimistically" approve a Mew response, but allow people to attach "flags" those responses Flags can then be used to softly filter what content a user sees, or they can be used to issue warrants.

One option could be that the Mew author specifies the types of flags supported for their content, and default filtering rules for different flags.