I mean, the whole model of YC is to take kids straight out of college (if not before) and turn them into startup CEOs. If those CEOs come out of that process not understanding the legal obligations of their new position, whose fault is that, exactly? It's not like they're bringing decades of business experience to the gig. The only thing they know about what being a CEO requires is what YC teaches them.
If their only preparation for the post is YC, and they're ending up ignorant of stuff that could get them slapped with a felony charge, I would think that would say more about YC than it does about them.