Submitted by an LCSW:
Recently a client asked that I look at a video she took of an argument she had with her spouse. She videoed the argument on her cell phone without her spouse's knowledge. I did look at it, and I could see him (but not her) and I could hear both of them.
Clinically speaking, the video provided insight into the nature of the problem, but my gut says I shouldn't have looked at it. It seems wrong to look at a video of someone who has no idea he's being videoed while arguing.