I do not like that theory of the fourth amendment. I am neither lawyer nor historian, but what I remember of the purpose was to prevent the state using the police as a means of harassment, as the British did before our independence. (Hence why seizure was highlighted.) Some of the other amendments, like the third, were also to remedy specific, recent abuses. Which is not to dispute the fourth's broader (and good) applicability, but I would wonder what the justification is for broadening it that much.
The purpose of the amendment is not to give criminals a certain minimum chance of avoiding detection by making it hard to collect evidence. That is just an incidental result. So long as such monitoring is not used as a means to stifle legal dissent, I have no objection to it.
My 2c. That said, I'm not a strict constitutionalist. The law should reflect the good of the people now, not just what guys thought a long time ago. If it does more harm than good, the mosaic theory maybe should prevail.