When does a cocoon become a tool of suffocation ? numero 2

I think that some parents have no ability to judge when they cross that line... the one where the healthy balance in their childs life experience is lost in a blanket mentality of ... you better not go on that swing you might fall off... you are too young to ride your bicycle on the path, you had better stay on the grass

but when things like this happen

http://uk.news.yahoo.com/050602/325/fk9ks.html

who can blame a parent from wanting to lock their child away from such evil... well what other word is there for it... and wrap them in a cocoon of blissful unawareness of the wickedness waiting for them in the neighbourhood or as in this case just in their own back garden