I can see that your trying to help your son with his problems on Blockland.
First off, you can't go around asking for trust or admin. Trust is how your able to build on the trusty's build or him to build on your build. You simply get trust from friends you play with, but don't trust everyone. If you trust a wrong person... You may as well say good-bye to your build. And Admin is nothing to ask for, because Admin is what a person does to keep control of the Server. As an admin, you are able to "Kick" people out of the server, "Ban" a person, "Spy" on a player, "Delete a player's bricks", "Change map" and the famous, "Destructo Wand." The Destructo wand makes it so you can destroy any build without trust. Admins can get banned, but Super Admins cannot. RTB, Return to Blockland, is recommended if you wanna create a server. Cause you can demote admins or promote, and change the server stats. To make friends, just say a lot of funny stuff and make good builds. They will wanna help and cooperate with you and they will want to be your friend. The community may be mean and offensive as Looplyla1 said, but some come to help and all.
I hope this will help your son with his problems. I dunno how I could have said all this...