Comment by delcypher

Doesn't look like it's been mentioned yet but there is very related project called Online Abuse Prevention Initiative (OAPI http://onlineabuseprevention.org/). It would be a good idea to talk to them in addition to what you are already doing.

It was covered on FLOSSWeekly earlier this year (https://soundcloud.com/twit/floss-weekly-331-oapi).