Unfortunately for him, photoshopped pictures qualify as a violation of the law. If you paste the face of a child on an nude adult or specific parts onto a minor your are guilty.
Probably rightly so. AFAIK this is also similar to the law in the UK. However, I do wonder about Jake and Dinos Chapman. Like them or loathe them (and some do), they are extremely highly rated artists in the UK, with shows in some of the top galleries in the country (I've seen them).
http://www.google.co.uk/search?q=jake+and+dinos+chapman NOT WORK SAFE (and this isn't even an image search)
As far as I can see, they are blatantly in breach of the law. I'm not saying they should be arrested, just wondering why the law doesn't seem to apply to them. It's ART doncha know?
Or where you can serve your country and go on any number of killing sprees in the name of peace before you're allowed to drink alcohol.
I've always wondered about foreign laws though.
Say if the photo in question was featured in a UK publication, where the age of consent is 16. Would that be legal?
Legal. See the Sun or News of the World practically every day. Go on the Tube or the bus, and someone next to you may well will be reading a newspaper with a 17 year old Page 3 girl topless and full-page. Not sure if they actually use under 18s though. I think they avoid them now.
Or what if someone was to view 16 year old US porn, in the US that would be illegal but what if the viewers country had a younger age of consent?
And a side Q- would an 18 year old US soldier serving in a country with younger drinking laws, would that be legal?
Generally, GENERALLY, the law of where you physically are applies. I went drinking in the pubs a lot as an 18-year old, like many UK teenagers. It was odd to go to the bar in the USA as a 20-year old and realise that I couldn't legally drink for another year.
Institutions like the Army may however have extra rules governing what you can do in your off time. So a USA 20-year old grunt serving abroad would not be breaking local laws by drinking, but might have to answer to his sergeant if he's ever found out.
Many countries are also bringing in laws regulating conduct of their own citizens while abroad - these are generally for violent and sexual abuse offences eg. stopping their own citizens from going to Thailand and renting children.