EDIT: Who sets the limit between what is implicitly private and public? Let's say I made the decision to add thermal vision to my left eye, and happen to see what you do inside your house. Am I hurting your privacy?
Common sense. In most cases, it resolves the issue. Yes - if you are snooping on me inside my house, you are hurting my privacy.
If your phonecall is as easy and neutral to observe as your face or height when you show up on the street you can no longer expect it to remain private.
Same way you coldn't expect conversation between two distant parties to be private before phone was invented an it could only be performed by shouting.
Taking a dump wasn't private act before toiled was invented and probably it won't again be when cameras will be as small as dust particles self powered wireless and everywhere.
Privacy of actions is noT some philosophical absolute. It's just function of what technology is available to how many people.
Also, I don't think my face or height are adequate analogies when playing against my wages, food preferences and trade secrets. All these details can easily give unfair advantage to "other parties" whereas my face or height couldn't help much except deciding I'm likely no good at basketball