If that means banning the sale of boots, then that means banning the sale of boots.
My system works brilliantly because there is no need to draw the line, because ANY line is necessarily arbitrary. Only in a system of unlimited police powers is there no arbitrariness; thus, the people have simple options if they do not like the path of the legislature: vote at the ballot box or vote with their feet. Not only is this system the most rational and the most just, as a happy coincidence, it is also the one most consistent with the Founders' intent.
My system works brilliantly
That's the usual argument cited to support a fascist state.
You do make a good point, though. If the police power of a state can be stretched to claim that the sale of sex toys is a compelling state interest and enough of a threat to make sale of same a felony, then the police power is pretty unlimited and personal liberty doesn't exist except as specigically listed in a state constitution.
So who is the favorite to be elected Ayatollah of South Carolina this year?