You can look at America to see what happens when seed sharing is outlawed (or made effectively illegal through contracts to acquire seeds that are then ruthlessly enforced.) Neither path is ultimatly friendly to small farmers it seems, so this line of thinking doesn't really hold any water to me.

That is a "city slicker" read on the American farmer. The actually farmers themselves learned long ago that savings seeds isn't worth doing even without the contract. The terms of the contract look bad from the outside, but to the farmer they are "I wouldn't do that anyway"