Answer :
When you drink salt water, your cells shrink massively due to large intake of salt taken that is almost 4 times the amount of your bodily fluids. Which causes you to dehydrate and die.
I think if I drank a lot of salty water it would not be affected or swell or shrink because I have drunken a lot of salty sea-water and I have never experienced shrink nor swelling of my cells.