Oddbean new post about login | logout But not everything thats added to the block can be spent. Eg tainted coins or deannonymised coins (that is any bitcoin) on a watch list. Which means Bitcoin is no longer fungible.
They can be spent and sent to any address in future block. Such coins you mention can be confiscated or frozen when sent to regulated entity but they are still technically spent. Solution is p2p economy and avoiding compliant entities as much as possible.