Community guidelines

This is an initial draft.  It's not complete but is far enough along that it's ready for more eyes and comments.
Coercing someone to report harassment, and/or reporting anyway is a bad idea. See: http://meloukhia.net/2010/04/why_didnt_you_report_it/ , http://geekfeminism.wikia.com/wiki/Conference_anti-harassment/Responding_to_reports#Law_enforcement and http://geekfeminism.wikia.com/wiki/Reporting_harassment for guidelines around this, as well as some explanation of why the policy says 'involve law enforcement or security only at a victim's request'.