You don't have an expectation of privacy. I do. I don't want to go outside and have my every move recorded. There is something deeply disgusting about that notion.
When a set of banal traffic observation cameras turn into surveillance of a particular individual, then you’re being unreasonably searched/tracked/stalked.
This should require a probable cause and proper warrant "we want to identify this individuals movements because …"
This is a clear violation of the 4th amendment.