There is no need to sign off on such a silly document.
You are being bullied. Get the string of bones above your ass together and tell 'em to fuck off. You are a grown adult woman in reasonably stable mental health (ok, you post here, but we'll ignore that for the sake of arguement), and there is absolutely no need for you to put up with that crap. If they insist on that sort of behavior, then let them play with the rest of the inmates of the asylum and move on. You don't need the aggravation.
Again, good luck and best wishes.