Thanks for this information, Mupitara. I'm glad I went to Río Blanco BEFORE reading your post. ... I felt safe enough--or was I just blissfully ignorant, and lucky?
Erik,
I really didn´t intend to make this post to discourage visiting the area. My intention was to inform relative to a specific security problem in the region. In general, I consider the atlantic coast region as safe - if not safer - than the rest of Nicaragua. And, I think that the atlantic coast has been unfairly victimized regarding safety warnings to foreigners in the area.
The more you know about the region, its cultures, and its history the better off you are. And, the more you are likely to enjoy your trip. I think that you were safe enough in all of the locations that you mentioned. You obviously took precausions to protect yourself. As a traveller and outsider, however, it is important for you to identify the potential danger spots and potentially dangerous situations so that you can avoid them.