While I would not be disappointed if this were true, the whole thing seems to be predicated on a dubious analogy. What is playing the role of the immune system here? In the case of MySpace, Facebook seems to have played that role.
The whole premise is just ridiculous nonsense. They are comparing a product that people voluntarily get and continue using willingly, to an infectious disease that people actively try to avoid and cure.
Just because the two prosper due to social interaction does not make them follow the same patterns, especially since everything else about them is completely different.
Facebook might die one day, sure, but it won't be because people develop immunity, it will die because something better will come along, whether that follows the same pattern as an infectious disease would be coincidental at best.
I am guessing this department is located next to the Astrology department at Princeton