With no transparency or right of appeal? As for your 'case-by-case' basis, how do we know that a stack of papers doesn't arrive at the judge's desk and they just wave their hands? In the UK I once got an official letter threatening me with bailiffs coming and taking my possessions. Why? Because the local council accounting software had a rounding error and undercharged me by 2 pence on council tax. The stamp for the letter informing me about the bailiffs cost multiple times that amount. Yet a judge/magistrate signed the order anyway. You cannot assume judges working in public view are doing a good job, let alone those working without public scrutiny or accountability....
It also does not enable broad-brush snooping. The law requires a judge to sign off on a warrant for access and the authorities must provide specific reasons for requesting access on a case by case basis. In other words, the person must be a person of interest in a suitably serious incident.
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