This is super relevant. How to protect your open source project from poisonous people.
http://www.slideshare.net/vishnu/how-to-protect-yourhow-to-p...
http://www.slideshare.net/vishnu/how-to-protect-yourhow-to-p...
The video to those slides : https://www.youtube.com/watch?v=ZSFDm3UYkeE