It is often noted that the discourse on my pages tends to be polite, and a few times a week I get inquiries about why this is true. It is very simple: tone flows down from the top.   If the top is organized, things may unravel as you get closer to the bottom, but its hugely better than if the top is scattered.  In this particular instance, then, it is simple: I strive to be courteous, and I demand courtesy from the guests on my page.  I will cometimes allow two combative guests to square off...