Hyponatraemia (lack of salt in the tissues) is very dangerous. The brain can swell as water leaches into it by osmosis. This condition is also exacerbated by drinking far too much water. There is actually no hard evidence to prove that a reasonable amount of salt is harmful. Also, the Great Cholesterol Debate has still not provided enough scientific evidence to convince me. (The drug companies who flog statins want us to be terrified of dairy fat) Wolfhound Person, I totally agree with you, just listen to your body and be prompted by it.
By the way, aren't biscuits dire now, with 'reduced fat'. They crumble like dust and taste of cardboard!