The flood of new users who signed up just to troll the Ferguson discussion got me thinking:
What if certain “hot button” topics that are likely to bring out the trolls (politics, guns, etc) were marked with a special tag that either imposed a waiting period for brand new users to post comments or automatically held them for moderation?
This has been discussed in a variety of forms
First I have heard of making it a per-topic thing, though I suspect you would want to trigger this behavior automatically based on the number of new users entering a topic.
After (x) new users enter a topic and post (y) times, trigger “community/mod approval for all new user posts” mode.
You could probably come up with a ‘controversy index’ for individual posts by looking at the ratio of replies to likes…
Mine data from google trends, and apply a sliding timer of how long a new user must wait based on key world analysis of the post blog post itself.
Additionally, sentiment analysis http://www.alchemyapi.com/api/sentiment-analysis/) could tell if a trending topic is getting out of control.
I’ll have a prototype built this evening 
(okay, tomorrow morning)
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