"Turn off chat channels completely, especially zone-wide public channels with a reputation for wild chatter. Activate language/profanity filters. Disable voice chat features, and don't use applications such as TeamSpeak and Ventrilo. Other interactions you might consider blocking include whispers/tells, group invitations, guild membership invitations and player-to-player trades."

This is just silly. If your child is so young that they can't handle any of this, then don't even let them play the game by themselves. What's the point of playing a MMO when you take away everything that makes it an MMO? It's like going to the playground and saying, "Have fun...but don't use the slides, swings, monkey bars, or the sandbox!" Instead, let them play with you until their old enough to understand these things.

Meanwhile, give them a single-player RPG. The gameplay is going to be vastly better, and depending on the game they'll learn valuable skills like puzzle-solving or storytelling that the grind of a MMO won't give them.