Happened before.
I know of several people who have lost their jobs after appearing in front of a TV camera. Some people of course, just cannot resist having their mugs on the TV, let alone idiots with big posh voices etc.
If you feel the need to blow the whistle, there are other avenues to take, if you want to keep your job. Appear on TV if you wish to commit employment suicide. If you do insist on being a TV star, remember this very important point. You, as the "star" will have no control over the editing of the program content.