Bring your situation to the host community if you are angry, puzzled, or otherwise uncertain about what to do. Establish trust early or expect suspicion for a long time. Bend over backwards to be fair and civil when challenged. You are performing the public drama of the foundation myth of the community. Signal that it's okay to experiment, okay to not take yourself and the whole enterprise too seriously.
Hosts represent the authority of what few rules there are.
People will challenge you just because you represent authority. One ounce of elegance and grace is worth ten pounds of argument. You can charm or seduce discussions back on topic, and conflicts away from the brink of brawl, but you can't force them. You feed the behavior of challengers when you lash out at them. The way hosts respond to public conflict with citizens, especially the first such conflicts, provides the opportunity to wield the most powerful tool for modelling civil discourse.