Be that as it may, we can and should seek to create a world where one can have that expectation of privacy.
Pointing to the status quo and saying that's all there is doesn't help us much.
(And yes, I'm being lazy here in not justifying my assertion that we should all be able to have that expectation of privacy; I haven't had my morning coffee yet, so just take it as a lemma.)
If you're talking to someone in a public park, and a stranger with a badge comes up and starts video recording your discussion while commenting "don't mind me, it's just an administrative search", and this happens to pretty much everyone all the time, you DON'T respond with "well, there is virtually no situation in which you should have a reasonable expectation of privacy."
