Why is raping a six year old considered worse than raping an 80 year old? Is the 80 year old considered less important? Will it affect them less because they've been through life?
Saying "crimes against kids" is as silly as saying "crimes against black people." Why should we single out a child as being more important or less punishable than a teen, adult or pensioner?
Murder by prolonged torture, probably. Jamie Bulger case springs to mind. And I'm not being particular about ages.
Mick