Cassie I don't totally subscribe to it's only a parents responsibility. I think we all have responsibility to do no harm to children. There are a wide range material and activities that are not appropriate for children and require more than a parental responsibility to control i.e. it takes librains, teachers, babysitters, neighbors, judges etc to abide by laws and often go further by use of judgement based on individual values. Seems like the judgement safest for children is a more conservative approach when the possibility of harm exists. Its a bit comparable to wearing a helmet or a seat belt. The methods to protect children do not need to be a restriction for adults.