Comment by 7e

Not quite the same. Attaching a GPS tracker involves physical trespass and can track a person to non-public locations. Also, collecting data does not restrict one’s freedom of moment. Nor is it stalking. Stalking is a pattern of conduct designed to intimidate or inflict emotional distress. Flock may facilitate staking, but it is not stalking itself. If knowing that someone else knows you were at a particular location at a particular time causes you distress, you have issues. Do you flee from every other car that sees on the road?