1. There can be no ongoing discourse without some degree of moderation, if only to kill off the hardcore trolls. . . . Providing the space but not tending the conversation is like expecting that your front yard will automatically turn itself into a garden. . . .
6. Civil speech and impassioned speech are not opposed and mutually exclusive sets. Being interesting trumps any amount of conventional politeness. . . .
9. If you judge that a post is offensive, upsetting, or just plain unpleasant, it's important to get rid of it, or at least make it hard to read. Do it as quickly as possible. There's no more useless advice than to tell people to just ignore such things. We can't. We automatically read what falls under our eyes.
10. Another important rule: You can let one jeering, unpleasant jerk hang around for a while, but the minute you get two or more of them egging each other on, they both have to go, and all their recent messages with them. There are others like them prowling the net, looking for just that kind of situation. More of them will turn up, and they'll encourage each other to behave more and more outrageously. Kill them quickly and have no regrets.
8. Grant more lenience to participants who are only part-time jerks, as long as they're valuable the rest of the time.