They could, but it's reasonable to assign the responsibility of allowing that access to the parents and the rules of the house. Do you think that minors should be allowed to purchase cigarettes? If not, then there is a line that you agree with, defined by laws passed by our representatives, that limits what a minor can and can't purchase. My question is why is a law about video game content different than a law about cigarettes, when what is in question is the harm to minors. The line has to be drawn by laws, by us. The Supreme Court should not be striking down laws passed regarding what society deems to be harmful to minors. Constitutional law should not be applied to the limitations that we as a society place on minors. It's ridiculous.