Here pops up another problem, beside my discussed theme about not to have any chance to push through your rules for your themed settlement.
Your only chance is communication, but the chatsystem is not helpful in many cases.
The worst part is, that you are not able to PM someone planet crosswise.
That means, if you are a themed settlement owner and someone claimed right next to your settlement to join and then build totally opposite to your theme, and you want to talk with him, you have to sit down and wait, till you get him on same planet or travel to said planet to be able to talk with him.
That could be the first step by Developer to separate the PM Chat from other and make it gamewide.
Since Talking is our only chance to handle out our rules and expectations, it is more than neccessary to be able to talk with each other at any time.