Saying an invasion of privacy is akin to rape is like saying that hitting someone is akin to murder. Yes, rape is a grave invasion of privacy, but that doesn't mean that this invasion of privacy, using the echo, is as heinous as rape. I view it more along the lines of wiretapping someone's phone or going through their mail: Disrespectful and most certainly illegal, but not something that would utterly traumatize someone like rape does.