Wonderful picture! As for others saying your pictures are found here and there. They should be aware that your information is on the pic making it plain to see for anyone that looks. The infringement only comes if the person is stupid enough to say it is their work of art.
Thank you! To be honest I don't really mind, I only care if I feel I can be held responsible for copyright infringement since in most cases the images I make are under someone else's copyright. Besides, as you say, it's not illegal to share artworks, if anything, they provide free publicity!