Placing a marker on TC volumes, or some sort of easily identifiable header, would have prevented governments from thinking that /dev/urandom data may in fact be

Placing a marker on TC volumes, or some sort of easily identifiable header, would have prevented governments from thinking that /dev/urandom data may in fact be TC volumes. By trying to hide the volumes, and to claim that they "are just random data", they've increased the risk to innocent people who may indeed have random data on their systems that may be mistakenly identified as a TC volume.