Once a person leaves the network (in the sense that they stop actively creating new CRC and transacting from the account), this account should not be actively used anymore, especially not for creating new CRC. This is because it would break with the principle that the human behind an account cannot change.
That said, it is perfectly fine for the existing CRC of the above account to still circulate in the economy and be spent. As such, it is perfectly fine for the CRC balances of the ceasing account to be distributed among active accounts. For example, a person deciding to leave could send all their CRC holdings (those created by themselves and others) to their friends, or the CRC holdings of a deceased person could be distributed to heirs.
