An interesting aspect of this, especially their blog post ( https://malus.sh/blog.html ), is that it acknowledges a strain in our legal system I've been observing for decades, but don't think the legal system or people in general have dealt with, which is that generally costs matter . A favorite example of mine is speed limits. There is a difference between "putting up a sign that says 55 mph and walking away", "putt…
In the US, the police do not generally need a warrant to tail you as you go around town, but it is phenomenally expensive and difficult to do so. Cellphone location records, despite largely providing the same information, do require warrants because it provides extremely cheap, scalable tracking of anyone. In other words, we allow the government to acquire certain information through difficult means in hopes that it forces them to be very selective about how they use it. When the costs changed, what was allowed also had to change.