Regarding the second point. Suppose someone went in your house and rummaged around looking at everything. Would you feel violated? Would it be better if you didn't know?
Or took naked pictures of you without you knowing about it?
Another example: what if someone stole something from you that you didn't need?
Some things matter even if they don't cause concrete harm.
I disagree; in the vast majority of cases I suspect your better off ignoring ephemeral harm.
That said many of the things that creep people out carry risks. But, IMO risk is a concrete harm. EX: False confictions are common so random searches cause concrete and measureable harm in aggregate.
Or took naked pictures of you without you knowing about it?
Another example: what if someone stole something from you that you didn't need?
Some things matter even if they don't cause concrete harm.