> It's inadvisable to try to stop the police from doing whatever they want to do if they assert that they have the right to do it.

The police regularly lie to and manipulate people about their rights in order to coerce them into consent. If you believe the officer is in the wrong, push back.

> You then get the lawyers involved and sort it out afterwards. Comparing the timestamp on the warrant to the time of the police action should hopefully determine whether parallel construction is taking place.

Parallel construction means they are using the opportunity to go on a fishing expedition. Dealing with it later is too late, they've already gone fishing.

This is a much bigger issue regarding the metadata of a wireless carrier. They're not issuing the warrant to you, they're issuing it to the carrier, who has a duty to reject overly broad searches. If they don't even get to see the warrant, they can't reject the search based on the merits. So now the police get to collect everyone's metadata. Who cares if we look at the warrant after? They've already got the data. Even if they "delete it" after, they already got to go fishing.

Nothing good is going to be solved by expanding law enforcement's power, reach, or lightening any existing restrictions. We are not suffering from crimes due to lack of law enforcement's legal scope. It's quite the opposite.

Your parallel construction is still too linear; this isn't git history. If they get a warrant AND tell you about it, the warrant dictates what they can look at, what you have to share, etc. Now they can look at anything because you have no idea what is off limits. If they find something unrelated they don't have to act on it immediately; they can then look for motivating reasons to get a warrant targeting an area they know will turn out. They go fishing, but for next time.