I do adult commission work over on FurAffinity, and I am usually witness to repeat customers. One particular customer, who enjoys adult art of copyright characters, has really gotten on my nerves. They had me do a full digital commission while in stream, and did not mention in his description that the character was a copyright character (his links also weren't all working, so if he supplied a reference that was recognizable to me as a copyrighted character, I probably would have said something.) I didn't actually find out until AFTER I had done the work and posted it, and that sort of annoyed me. This is a minor problem that I simply shrugged it out on, but he got worse soon after.
Upon completion of a VERY adult artwork of a copyrighted character, I sent him the finished work, as well as a smaller resolution work for him to post to his account with linkage back to me. Because I wasn't comfortable with posting the image, I asked him nicely to post the smaller resolution work only, and to keep the large image for his own personal archives. He proceeded to throw what I can only compare to an adult temper tantrum, going so far as to say that I was "neutering" the work and that I was being unfair. He very much wanted to post the larger image, and insisted that other artists he had commissioned had let him post the large image. I told him that because I wasn't comfortable with the material in the commission (I had already gently told him before that copyright characters beyond Pokemon/Digimon/generic weren't my thing and there was a strong possibility that I would not be posting them to my gallery) and because it was my work, I requested that a smaller size be posted so that I wouldn't be seeing a big version of art that I wasn't comfortable being linked to me all over the internet (previous commissions I had done to him had ended up on "adult toon" sites in a matter of days.) He hasn't so much as talked to me since (we used to chat casually on Skype) and has not been a repeat customer.
I got so steamed about being treated in such a way after delivering a decent piece to him that I entirely rewrote my TOS to include a segment about dictating the size of art posted to galleries other than my own when I wasn't comfortable posting them myself. Looking back I am still upset about the situation, but I wanted to see what you guys thought. Was my action correct? Should I have done something different?