The Bitcoin community could agree on one block to be the "last" block and compute all balances reached so far. Then start a new block chain with a special first

The Bitcoin community could agree on one block to be the "last" block and compute all balances reached so far. Then start a new block chain with a special first block which initializes the balances. This requires a protocol change and lots of coordination, but may be preferable to a situation where mere possession of a copy of the block chain qualifies you for jail.