I agree with Fabricio, "different times back then", "it was the 70s", etc, cannot reasonably be used as a defence. Sexual abuse has never been OK. But we need to remember that we have already had one false accusation of a public figure, and it won't be the last. We also need to bear in mind (as others have said) that morally, there is a world of difference between consensual sex with a 15 year old, and assault of a helpless young child.