Really, looking at this case, it is a textbook example of how one or two seemingly harmless mistakes can begin to multiply and take on the proverbial "snowball effect".
This one had a happy ending, but as can be seen, could have ended tragically. The right thing to do was to go and get him, rather than try to talk him out of the woods. Considering the mistakes he had already made, it might have been impossible. Also, at that point he was certainly in the early stages of hypothermia and would soon be losing any semblance of rational thought. I would not want to try to talk someone out of the woods on a cellphone that might fail at any moment, especially considering his worsening condition. This would have been as negligent as his own acts. Not an easy thing to have to live with.
Once he called 911, all the right decisions were made by SAR. Thanks for being there, guys!