Yes, though some actions are usually considered to imply consent... for example, if someone tells you the dollar amount of a bill, and you hand them your card, you can't reasonably argue later that you just wanted to show them the picture on the front.
Yes.
Yes
It may not be illegal, but it would certainly be invalid. The credit card holder is the only person legally entitled to sign his credit receipt.
Threats can be illegal. This would not be a safe thing to do and could lead to criminal prosecution.
(in the US) Unfortunately - yes.
Yes
No.
I dont belive so.
No, you cannot apply for a credit card in your husband's name without his signature and consent.
No, a company who wants to make a loan is not allowed to pull your credit without your consent. If you've filled out an application form or provided your information to the bank, in the interest of obtaining a loan they have every right (and if in writing, your consent) to do a credit check to view your history.
YES
Yes, it is illegal to take an adult's credit card without permission. Taking someone's credit card without their consent is considered theft or credit card fraud, which is a criminal offense in most jurisdictions.