Code of Conduct
Define a code of conduct to avoid assumptions and provide clear and direct help
A constructive and open to diversity community requires a code of conduct for many reasons. One is that each culture and class has different assumptions that are not obvious to other cultures and classes on first contact. In one culture a touch on the shoulder may be OK while in another it is seen as unwelcome contact.
Good primer on why a conference needs a code of conduct; http://rachelnabors.com/2015/09/01/code-of-conduct/
So does an online text chat community.