I think it was wrong of the artist not to ask permission to do this plastic work, much more here in HIVE where everything is monetized could be seen in a bad way, perhaps it would blind him in some way at some point his desire to get your friendship or if aseptacion, to take it to the more formal plane on the subject of naivety. Although there are better ways to please someone, to get to know someone, therefore he had every right to reject this behavior towards his image.
In my personal criteria I would also have been annoyed, although I understand the artistic part because I also draw and when I like to paint it, I do it without further ado, but in this case because it is a matter of ethics it should have been discussed. As for the issue of privacy, I don't have much of a problem, since my profile from the beginning I have always given my face because it is my life that I capture in my blog, anyway in the social networks of the web2 we spend it saying what we do to other people, at least here we find a little sensitivity. But I understand your point of view because you have every right to take care of your privacy. Greetings from Cuba 🇨🇺.
Probably this thought was also behind the decision, but it was deployed incorrectly and there's better ways...like commenting on my posts like you have.
I know there's people out there who will see it (my) reaction as an over reaction and that's ok, they're them and I'm me, I just feel some manners would have been appropriate. You know, when my brother @tarazkp, wants an image of a gun or some firearms related image from me he doesn't take it from my posts...he asks permission, my own brother. I think it's a courtesy a stranger could easily employ.
All the best for the day/night and hopefully that hurricane didn't do too much damage.