Replying to myself to address responses.
I didn’t express an opinion about whether it’s a good idea or a bad idea. All of you have had an immediate emotional reaction to the idea that there’s no legal “right to privacy” from your spouse. The legal question and the ethical questions (should you be aware at all time what your spouse is up to? should you dig around in their personal journal or phone to learn thing?) are separate.
Should you invade your spouse’s privacy? No. And if you’re constantly paranoid enough to be doing that, you likely have issues that are negatively affecting the relationship.
There’s not even proper protection of your privacy from strangers and companies, let alone such from a spouse.
Should there be? Of course.
The arguments against this behavior don’t even need to include spousal considerations. It shouldn’t happen, period. When it happens, it should be punished, period. But when it’s punished, “oh, it’s just my wife” isn’t a defense - not because spouses should have privacy protections, but because the system was abused.