> they can just figure it out Yes, but that is computationally expensive at the ISP level. Turning on deep packet inspection for one user is way overkill. Doin

> they can just figure it out Yes, but that is computationally expensive at the ISP level. Turning on deep packet inspection for one user is way overkill. Doing it for everyone? Congrats, you've just completely trashed out your core. Performance tanks. You lose customers. It is opportunistically expensive, as well. Tracking down users on a case-by-case basis costs a lot in real time, as well as human work hours. It is almost never worth it to an ISP do to this type of inspection -- ie, 'just figure it out' -- unless they are being compelled to.