Having spent most of a career flying an aircraft with a video recording rolling 100% of the time in flight (and with that recording reviewed after nearly every flight), I've learned to watch what I say in the cockpit lest it be heard by the wrong person, either by stuck mic or the recorder.
I got bit by it very early on in my career when I was a student learning to fly the F-15E. I had a flight lead/instructor who was very condescending in what he said to me and how he said it over the radio in flight. After one of the radio bitch-slaps, I said to myself over the intercomm, "Yeah, yeah, you don't have to talk to me like I'm a f-ing third grader, •!" Since that took place during an administrative portion of the sortie, I never figured that the video recording of that portion of the flight would be seen (we do an in-depth review of the tactical portions of the tape).
So, while we're in the debrief, the flight lead is fast-forwarding the 8mm tape to the tactical portion of the mission, and stops the fast-forwarding to check and see where the tape is. When he presses play, the first thing you hear is my flight lead's sarcastic comment about my formation flying, and my in-cockpit musing to myself out loud. He was less than amused about what I'd said and gave me quite a dressing down about it, including an object lesson that the tape (and potentially the stuck mic) is ALWAYS listening to what you say.