I understand where parents of victim are coming from adn most probably take the same stance of more harsh paunishment for these crimes. But entirely reducing the age for juvenile some how does not sound right. The reasons are 
1. While the kids are more clever now a days I see not much done to to improve morality in education -- Not even as much as physical education periods
2. Internet in hand means lots of wrong things show as right, i personally know adults who beleive the news or forwarded news like items in WhatsApp is right (99% of them are wrong) and actual news website&#x2F;new watching is redcuing close to zero with youngsters
3. No vent out for youngsters i.e. not enough parks, parents pushing youngsters to money - no matter what. i.e. If you tell your kid it is ok to cheat govt or give bribe now-a-days and say that eve teasing is bad then they take either both bad (if they are intelligent) or both ok.
4. There is a serious need for parent to know and teach kids about internet - about 60% parents know kids can watch nasty stuff on internet but they just dont know how bad it is and how to educate kid on what is right and what is wrong, i would even encourage indian telecom providers take ownership of teaching this to parents and kids