TD55's analysis may be close to the mark. I don't have a lot of 'data points' to draw from, but I'd hiked the 100 Mile over 10 years ago, and accompanied my son on part of his thru-hike this year, and did another section as well. Both times were coincident with the NOBO bubble in Maine. My impression, however sketchy, is that there is more stress put on the trail now than, say, 10 years ago. It's more difficult to say for sure that there's more irresponsible behavior, but just an increase in the number of people might lead to that, as numbers increase. I can see how this generates concern.
So, indeed, Scott may have been chosen because of publicity as a kind of warning shot.