Yes, I should point out that some people might consider a knee-jerk reaction to a report like this.
I have seen plenty of posts espousing the use of salt tablets. This can be very dangerous if the athlete is actually dehydrated as too much salt can lead to renal failure and other problems.
The best plan is to avoid dehydration and hyponatremia through conditioning and sensible intake of fluids. There are plenty of good tips provided in the article on the coorunnings website.