The news services should adhere to National Geographic's standard. They require their photographers FedEx them the original memory cards. Photographers are not allowed to delete or alter any images.
The editors then scrutinize any questionable images to make sure that they could logically have occurred relative to the other images on the card.
Trouble with that is, it could be days or even weeks before news images could get published with rules like that.
National Geographic can afford to have restrictions like that given that they are a monthly publication with articles planned, written and illustrated months, if not years in advance.
An news organization would be pretty lame if they couldn't publish promptly...Especially in the internet age.
Besides, that would just give them longer to do their fakes better, so it would be more difficult for us pajamahadeen to catch them. It is the agenda than needs to be changed, not the technology and rules.
People just have to learn what can be done with digital imaging..