We don't tolerate child porn of any kind, and I don't care if it's a "mistake" how it gets here. It puts us right in a very nasty legal firing line (and believe me, if you upload kiddy porn here I will have NO hesitation to providing your details to the authorities).
That said there's no use jumping up and down and screaming "Kiddy porn was uploaded a few minutes ago and nothing has been done about it yet!" - we work, we have lives, we even sleep occasionally. We can't watch the site 24 hours. As Darkklown said, email firstname.lastname@example.org
and tell us the URL and we'll remove it as soon as we can. It's the fastest way of informing us by far