I believe there are many and varied reasons why some didn't accuse at the time, or did and were batted away. Age, experience and collective support can offer you a confidence to face the industry and public scrutiny that follows such accusations. Life decisions are rarely easy for the young and vulnerable.
All such accusations should be listened to, unfortunately there seems to be far too many almost frivolous and seemingly pointless accusations that are creating a media fog around the truly serious accusations that deserve full and immediate action.
The cork is out of the bottle and the mischievous genies of the fourth and fifth estates will have their day...
...I think the sad thing is that the nature of some men and women means very little will actually change, they will simply cover their tracks better.