One of the first things we teach clients; always assume your microphone is hot (open). When you are sitting in the guest chair about to be interviewed, do not say anything you would not want to go public. And when the interview is wrapped, skip the silly remarks. You never know if your mic really has been cut. Even if you aren't going out "live", a controlroom full of people may still be listening and possibly recording. When a TV crew is shooting "cut-aways" (before or after the interview) you are still on mic and on the record. From President Reagan to Jesse Jackson, hot mics have been getting people in hot water for decades. In California, another politician has joined the "open mic" club. State Assemblyman Mike Duvall resigned this week after getting caught on tape talking about his sexcapades with women lobbyists. Duvall is married and known as a "family values politician". To top it off this conversation with a fellow lawmaker took place in the State Capitol at a committee meeting, recorded by in-house TV. This is wrong on so many levels. But it does serve as a lesson to others with loose lips. When there is a videocamera in the room, or any kind of recording device, you are "on".
https://www.womenmediapros.com/Public/Services/MediaInterviewTraining/index.cfm