Great primer Anarcho. You said: We've used this guiding principle to craft the "rules of the game" here as well. If you read the seller's guide, you'll see a restricted items section: Now, while trading in any of these items does not harm either party in the transaction, and is therefore acceptable as an isolated event, we recognize that the transaction would not likely exist without the existence of a victim as well, and so we don't allow them. This morality is simple, powerful and profound. In any given situation, you can use it to judge what is right and wrong. If someone is being forced to act against their will without provocation, then it is immoral. The criminal in any immoral event can be discovered by finding who is initiating the use of force or fraud. It then follows that the only acceptable use of force is in self defense against the criminals initiating it.