This really isn't a reasonable expectation. There are only so many judges, and being on-call 24/7 for all emergencies is not part of their job description, and it probably should not be, either. They need clarity of mind when they're making decisions, not to be in a sleepy mood. Moreover, you seem to be proposing a solution in search of a problem. There isn't widespread abuse of this by cops in the US (that I've heard of, anyway) to justify upending an otherwise effective procedure.