I think that these cases bring out the most extreme reactions in people - which is perfectly understandable.
However, aside from the emotions raised, we have to think seriously about the actions, and conseqeunces involvd, not only in the case itself, but the proposed 'punishments' being mooted here on this site.
As a parent, i can fully sypmathise with the gut reactions of people who want to hit back at the causes of such omnumnetal mental anguish for an innocent family, but remember - laws are what make us civilised. the kind of lynch-mob mentality has no place in a civilised society which must deal with its aberations in a structured and thought-out way. Other than to to this leads to anarchy - vigilanteism and lawlessness.
How would I feel if it was my child? Destroyed, but not vengeful - such emotion is simply destructive, and solves nothing - even for the family involved - much less for complete strangers who are simply venting their own feelings on an issue of which they understand only the media perception.
Life is never that simple - and neither is punishment and / or revenge.