2. This game is only the FIRST of what is likely going to be FOUR games with possibly EIGHT expansion packs that Bungie plans on delivering over the next ten years.
IOW, this is the FIRST CHAPTER in a long tale...and you don't show and tell your audience everything in the first chapter.
3. Bungie is trying to create a space that will endure for ten years....and has to take steps to reduce the mischief and chaos that the crazies, kiddies, and bullies can create when given anonymity in a situation like this.
In time, Bungie will find the right balance between freedom for the positive people...and limits on those who want to cause trouble.