Fine in that situation, with necessary safeguards but widely drawn powers have a habit of being abused. I’m thinking if the people arrested for being in possession of a privateye cartoon. Look how Trumpf abused his powers.
I also have great reservations about any more intrusion. But I think the OP article has skewed what is actually happening. At the moment, this doesn't seem to be about arresting people for pre-crime. It seems to be about police forces getting ahead of the game so that they can be in the right place at the right time.

