Crowd sourcing the moderation via flagging

#1
I searched but I couldn't find an add-on, where the forum members, flag posts for spamming, trolling etc.
Like a self cleaning feature?
If say 10 members flag a post as spam or trolling, it will be deleted.
It basically crowd sources the moderation, and it also involves the members in the administration of the forum.

Is there anything even remotely similar?
Would be great right?
 
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