The point really is not as much that lacrosse is not football as lacrosse as of yet does not mean that the Universtiy is violating TV contract by canceling games. Of course they were violating conference contracts and I am sure they took some heat for that.
Though they won't admit it, I bet canceling the season is the action Duke right now regrets the most. That imposed costs on others like UVa, UMD, UNC, etc.