A "smart" product is generally a spying product, and that's true for cities too. In addition, their spy systems tend to be privatized, so there is no public accountability about what data they collect or how that data is used.

Supposedly the data collected in Stratumseind is "about crowds, not individuals" -- but what does that really mean, concretely? Does it mean that the record data do not permit identification of individuals, only of crowds? If so, maybe it is not a threat to human rights.

But it could mean that they collect and store data about lots of individuals but they are only interested when that data shows a crowd. If so, that is no protection at all, and no excuse. Tracking people's movements is a threat to human rights, and we must not stand for it except in very small and limited ways.