I think sacrificing liberty for security is generally a bad idea. But it seems we're increasingly sacrificing liberty for nothing, which is a rather worse idea. We're creating a dystopia for what? To get people to click on ads on one front, and on fronts like this - the pretext is mostly to stop terrorism, but that's something that should be cleanly quantifiable. So let's quantify it. How many terrorist attacks has this stopped? I think the safe ballpark is exactly 0.
I also don't understand why more people don't seem to ask this question. Can governments do this is going to be an extremely difficult to answer question that few of us lack the expertise to even begin to delve into. Even for those of us with it, there are contradictory views. It seems much easier to answer should governments do this. And if they're driving a meaningful deterioration of society, as I would call the stripping of basic rights of individual privacy, and have nothing of substance to show for it - then this is something for which there is no ambiguity whatsoever.