Why is looking at/possessing kiddie pron illegal?

[swiggidy]

If I watch the house across the street get robbed and I enjoy watching it and perhaps even record it so I can look at it later should I go to prison? It's not illegal to not help someone.

I don't find the analogy to be adequate; we are talking about kids here and not inanimate objects.

i meant someone going into another person's house while they are home - not just the house itself.

I find watching someones house get burglarized and doing nothing, especially while they were home, also morally reprehensible.

If you're going to use this argument is pertains to child pornography. If you posses something that was stolen, you can get arrested for it. A crime was committed during the "creation" of the object (i.e. stealing created its availability).

If we consider taking pictures of underage people a crime then you should also punish those who try to benefit from the crime. This is fairly consistent (stolen property, insider stock info, etc).