Predictable.
There had to be a downside to running in bare feet.
Science of Sport:
Vibram shoes named in lawsuit: The danger of barefoot running
Vibram Five-finger named in lawsuit – zealousness, unfiltered advice creates more problems than it fixes
The main problem seems to be heel strike impact force.
related – ‘Born to Run’ author helping search for Boulder ultrarunner Micah True
True, better known as Caballo Blanco, went missing while out on a run.
besthike.com 
a) The lawsuit is primarily about false and misleading statements, not the benefits or problems of barefoot
b) One of the misleading statements is that VFFs are “just like barefoot” (when the few studies testing them show that they’re not).
c) No serious barefoot runner thinks that VFFs = barefoot, so any condemnation of VFFs says nothing about barefoot (check out Ken Bob’s book, Barefoot Running Step-by-step, where he has a whole chapter about why VFFs do not = barefoot.