How and when is it legal to a) record someone without their awareness and/or consent, b) broadcast or publish that recording and c) use that recording in court ?
I think it's illegal to use that kind of recording in court at all, for example police was thrown out because they recorded criminals in jail without their awareness, and that was considered invalid. But does that extend to someone receiving (for example) death threats from anonymous phone calls, and deciding to record their calls ?
The distinction I'm making between recording and publishing the recording is that it's how it works for photos : you usually have the right to photograph about anything (military bases are an exception), but privacy and the "right of image" prevent publishing things unless they are in a public context (sort of). Is it the same for audio recordings ?
In general, I'm asking to what extent there are restrictions on recording someone without telling them in the context where the recorded person may exert a threat on, or assault, the recording person. Also, let's stay in contexts where the recording person is part of the conversation, i.e is at one end of a phone call or has a mic on physically. Not cases of leaving a microphone under a table or wiretapping someone.
