Our Insult Policy- Read it, Live it  
Basically No personal attacks.
It's acceptable to voice disagreement with another member's opinion, technique, politics, approach, lifestyle choice, etc.  But no insulting (or links to attacks) of individuals, nationalities, genders, political preferences, lifestyle choices, etc.
While this may sound restrictive and categorically un-Taoist, I believe it is a useful guideline to help us stop for a moment and think about how to present our perspectives intelligently without just flinging unproductive rudeness at each other. This way other members can receive value from your perspective and you can gain clarity by reasoning out why you initially felt compelled to verbally put down someone else for being different.   No one, including the originating poster, gains anything from statements like "So and so is a complete moron", etc. If you have an opinion and you believe it's relevant to a topic at hand, post it as constructively as possible so we can learn from you, debate with you, ignore you, whatever.

If you can't abide by this simple constructive guideline, either create your post in a PPD or expect it can be moved. This is our mini-octagon here for those of you that insist on a more primitive breed of taoist war.