GGGRRRRRRR! You must spend many hours on your paintings. Your work is amazing. That guy's attitude is frustrating too. Facebook is out of control.
There is a guy I always see getting jacked on facebook. He makes really great drawings and he portrays his concepts in a very unique and understandable way. So it is easy to see why so many people like it enough to steal it, but I feel bad for the guy. He is eternally dealing with it.
But this thieves out here might be telling us that we, as artists, are not taking advantage of the t-shirt and calender business. ;)
I don't really worry about it much. Remember the saying, "imitation is the most sincere form of flattery". Nobody has yet made a fortune on my art work, and if somebody does, believe me, they will have me to answer to! Actually I have mugs printed with my art work, and pillow cases too. Am planning to add shawls.
I spend about 2 and a half months on each painting. I love enriching the surface, layer by layer. Happy painting to you!