Nowadays when someone is inactive or decide to erase his account, it disappears, so when it happens, instead of erase his account, this account would go to a "storehouse" till the end of time.

But if someone wants to create a new account in THIS universe, he will be able to chose between two options: Create a new account with 0 points or start with one of this "erased" accounts of the "storehouse".

We could show him some details about this kind of account like: point, planets, ranking and a little bit more details, but not all details . And then he decide what he gonna do.

This suggestion is perfect for old universes.

But with your thinking there is not any way to prevent the depopulation, because always we will be able to say "A lot of borderline players will ask "friends" to get back all erased account only to have push with... "

So, what will we go to do? I saw some suggestion about it and in all there is the problem that you say =(