How, exactly, would this be achieved? You'd have to filter every internet packet looking for bitcoin transactions and, as soon as you start doing that, someone

How, exactly, would this be achieved? You'd have to filter every internet packet looking for bitcoin transactions and, as soon as you start doing that, someone will figure out how to bury them so your snooping doesn't work and Bitcoin will go right on running. One may not like decentralized currencies (and I certainly don't like the scammy ones and the crappy exchanges) but that first word in their name makes 'em really hard to stop.