Americans are at much greater risk than e.g. Europeans given the potential for negotiational leverage. There have been very, very few Europeans that have come into trouble in history. As long as you listen to the guidelines given within the country, you are perfectly fine.
As for the picture sharing: I am well aware I can not share everything in here, and I will not. However, I will do my best to show you as much as possible without jeopardizing others (i.e. my guides could get into trouble in case I share some of my pictures online).