I agree wordfactory. I think it's important to support children, make them feel secure and loved, but at the same time I think it's fine for them to experience disappointment, disapproval, boredom, rejection (by friends, not family) and to understand that yes, bad things happen, but life goes on.
I had quite a tough childhood in some ways, my parents gave me zero emotional support, and while it definitely wasn't a good thing, it did have some positives. I am very independent (perhaps too independent) to the point where, when people asked me who I cope with DS when I have no family support apart from DH I honestly couldn't understand what they meant. I just don't expect anyone to help me, which means in tough times I just cope. I don't look to others to pick up after me and any help I do receive I'm extremely grateful for. Sometimes I think my approach is all wrong though - perhaps I try to do too much by myself? Hard to say.
I think my approach with DS will be to let him know that life can be difficult and unfair at times but that almost every hardship in life passes and you can move on to better things. I don't protect him from disappointment, even at 13 months - if he wants to open the cupboard and take out all the stuff, I just won't let him. He cries, and I'm sympathetic, but he'll get over it. What I want for him is not to crumble when life is not all it's cracked up to be. I want him to be able to take disappointment on the chin and still walk on smiling when things are going wrong. At the same time, I want him to be able to truly enjoy the good times and to be a kind and generous person. Not much to wish for, eh?
I am very much against protecting children from things like death and failure. These are facts of life and if you come up against them as normal things then they lose their power to frighten you. In Irish culture it's normal for small children to see and touch the dead bodies of their relatives, something that I think makes death seem like a normal part of life rather than a scary unknown. Equally I always think it's a bit mad when parents won't tell their curious children the facts of life - what exactly are you protecting them from?