As with anything, you break the law and it's up to the DA to decide if you are prosecuted, not everyone that commits a crime gets prosecuted. In this case the people involved did classic one party recordings that are illegal in California. How the public perceives that illegal action will likely determine if you are prosecuted or not. Considering the published recordings were doctored to make it look like people said things they didn't say that action probably increased the likelihood of them being prosecuted, in addition no finding of wrong doing on the part of PP obviously increased the likelihood because you lose the argument of public good.
These guys weren't journalists, they were political operatives lying to people so they could illegally recording conversations without the consent of the party in a 2-party state and then doctored the recordings to make them say things they didn't. That will get you prosecuted in almost every state that's a 2 party state. In addition the use of fake drivers licenses and lying about their names and stuff puts them up for false ID charge and a fraud prosecution.
I would be surprised if they didn't prosecute them given the conduct involved.