Copyrights are hard to enforce and unless I want to add all kinds of watermarks I have to trust the populous to be fair. In a peace offering I am publishing almost all my pictures under Creative Commons license. All I am barring is the use of my pictures for or directed towards commercial advantage or monetary compensation.

You are allowed to
Share — copy and redistribute the material in any medium or format
Adapt — remix, transform, and build upon the material

As long as you follow these license terms
Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
NonCommercial — You may not use the material for any commercial purposes.
ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.

wiki.creativecommons.org/FAQ