not all searches are equal, but are being treated so here.
someone searching the name of a non famous person within a tight time frame and within a tight geographic area, is not the same as someone searching "terrorism", or marijuana, or Taliban or Trump or election or voting machines.
if someone not well known has gone missing, and someone who isn't law enforcement recently has been asking around locally about the address and phone number of that missing individual, law enforcement has always been interested in knowing about that type thing, and i wouldn't classify that as a fishing expedition..
could subpoenaing search histories become a slippery slope and turn into fishing expeditions, absolutely.
scope matters, and our beyond corrupt judges and the corrupt system that put them on the bench, have failed to protect the citizenry from the govt.
don't we all believe in law enforcement, just as we believe in capitalism.
and if free market capitalism is the best capitalism, then isn't free market law enforcement the best law enforcement?
after all, the name implies "freedom", right, so it must be good?
but freedom of whom, to do what, must always enter into the equation as well.
free market law enforcement, like free market capitalism, has no off switch, and will always go as far as it's allowed to go, then several steps farther.
where lines are drawn is always the operative factor, and corruption is the enemy of proper line drawing, be it law enforcement or economic regulation.
in an inherently corrupt political system, which exists anytime money is allowed to buy govt, literally everything encompassed in that political system becomes corrupt as well, with no way to stop it other than remove the corrupting influence from the equation, which is money in our case.
if or when that "slippery slope" emerges in the govt subpoena search thing, i guarantee you money would take over controlling what is and isn't being sought after in investigating search histories.