I honestly do not see how the 4th amendment's text obviously applies to surveillance, especially as it pertains to being identified in public. I don't even think it matters whether or not someone is a suspected criminal. It's not a search or seizure. And only in case law are there examples of the text being interpreted in favor of things like audio recordings needing a warrant. But this isn't one of those amendments whose text is clear on an issue like public facial recognition.