By licensing the art under the creative commons attribution, non-commercial, no derivatives license you have given express written permission for anyone to use the art so long as it isn't modified, you are given credit and it isn't used in a commercial endeavor.
This is in conflict with the comments you left which suggest that you do not want your art used in that way. If that is so, it should not be released under the creative commons license. If in conflict, only the license has been vetted by lawyers and deemed enforceable. Please educate yourself about the creative commons license. [link]
A simple copyright with no license is the most restrictive set of permissions, if that is what you'd like. Under simple copyright the work can only be used under the fair use doctrine, which mostly is limited to small samples or thumbnails for purposes or review, satire, etc.
Hello this is a standard message to let you know you have been featured in the "Best of...weekly photomanips features" #102 & #103 news article [link] I'd appreciate it if you didn't reply here but posted a comment on the news article! Thanks for sharing such beautiful art with us and keep up the good work!