you pretty much answered your own question... that's why they say it.
It just gives it that "im not scared of you" look. Anything you say or do CAN and WILL, be used against you.
Anything you say can and will be used against you in a court of law. Were you read your Miranda Rights. Did you sign a statement saying you understood these rights?
The right to remain silent. You do not have to say anything, as it can be used against you.
Anything they can find which is relevant to the case can be used against you.
You have the right to remain silent; anything you say can and will be used against you in a court of law. You have the right to speak to an attorney. If you cannot afford an attorney, one will be appointed for you. Do you understand these rights as they have been read to you?
no as long as you do not say anything bad
You don't have to say anything that may be held against you.
No it does not.
As far as the Bible is concerned, it doesn't say anything against it.
Self-disclosure might be used negatively against someone when the legal system is involved. Our rights as they are read to us when arrested state "Anything you say can and will be used against you in a court of law". This is quite the opposite of "Innocent until proved Guilty", is it not?
Nobody recorded anything that Shakespeare said when he was offstage. Nobody thought it was important. We can hardly know what he used to say a lot when we don't know anything that he used to say.
This so called "rule" has been used for many years and is used to teach kids proper etiquette.