[patrickaljord]

This is true of most blockchains though, if a majority of nodes are blocking an address, the coins can't be transferred. Granted, this is more likely to happen with tiny consortiums like Libra.

Do you know how would this work in Libra's case in practice? Would there need to be a super majority to block a given address? I guess the government could force the whole consortium to block an address though.

On the other hand, the government could also use anti-terrorism law to force coinbase and any legal exchanges to ban a certain bitcoin address and any movement from this address. Coinbase already banned all people sending coins to sites such as the dailystormer for example. While this was a private initiative, the government could pass a law to ban people and businesses from sending bitcoins to Iran for example. Hard to enforce I know but scary enough to be problematic (see war on drugs for example).