That has nothing in common with democracy and decentralization ... I think that you are using big words to spread FUD. Where you have centralization here?
This feature is made not as a tool to attack others/to restrict rights. It is made to make sybil attacks as hard as it is possible.
And all i can do as an inviter is to kill max 2 epoch old account which is worthless (despite few stake coins that will be burned ~5-10$ loss for this poor guy) what will give me 0 profit. What's the point of doing that?
So much FUD, big words and this will harm 1 person out of 1000 only because he took invitation from stupid bustard (and it is not recommended to use/give invitation to random).
I think that you are Troll/paid FUD maker. I suggest everyone to simply ignore him. Maybe he will go away.