RTB4 already has a working buddy list system. Very useful, especially since you can join friends through it.
As for floating bricks, the brick system is based on brick trees. If they aren't connected to anything, they all die. And this is for good reason: Imagine you build a house and make sure no one can get in while you furnish it. Suddenly, you see this ghost brick just float in through the wall, in mid air, stop and place itself. Now you're thinking "The forget?" and hammer it. It is that noob who you told couldn't get in. Suddenly, he starts spamming them all inside your house, and the admin isn't there to stop him. You give up and rage quit. Not a pleasant experience.
