Must every statement on Slashdot be misinterpreted to the maximum amount permitted by ridiculous thought?
I don't know, but you seem to be doing a fine job of it.
I think the divide between me and the OP is like the difference between advisory and mandatory file locks. I see privacy as, at least in part, an issue of politeness: certain things (like the insides of people's homes, regardless of whether people happen to be naked there) are commonly understood to be private, and violating that privacy by e.g. taking pictures and posting them is frowned upon, even if technically possible/legal. Arguments like that made by the OP, on the other hand, seem to take the stand that anything not explicitly disallowed (e.g. by closing windows) goes, and woe unto him that neglects proper precautions.
As one who grew up under the advisory system, admittedly before the growth of the Internet that made the latter one such an issue, I find the mandatory system displeasing, hence my comment: from my position, the idea that one must shut one's curtains to be afforded privacy is a sad one. At the same time, I recognize the likelihood that the Internet will encourage it among younger generations (see Facebook, Twitter, etc.), hence my second paragraph.