The article I referenced says that it varies by state, especially with regards to consent. Some states are single-party, some states require all party consent.
But if you're on the street in public, you'd think everything is fair game... especially if you're a public servant.
It's nice to see someone taking a stand and clearing it up (in one state at least).
And if that is decidedly secret, then nobody should care as long as the unlawful audio is removed before distribution.
I use the term unlawful audio because only the personally identifying information should need to be censored/removed.