I haven't thought about that before, the art use without giving credit to the artist.
I will have to start doing that from now on.

I feel weird about using a real life image of someone as a faceclaim. I have done it before with celebrities who are not as well known, but for the most part, I prefer to not use famous celebrities because when I see them, I already have their characters in mind and I worry my character will be too similar to theirs if I'm using their picture as a faceclaim.

Most of the time I use digital drawings from life of other people. (Such as celebrities or drawings used by reference) to avoid the whole, "I'm stealing someone's art" feeling. Then I also don't have to feel weird about using a real life celebrity's face as my own character.