I don't think claiming they are stealing is entirely accurate.
Look at it from their point of view, they find a website that uploads images of Graal files with the motto "For Graalians By Graalians".
These people don't know that all these files were stolen it actually looks like the opposite, they find something they like and edit it to what they like even more(so no, it wasn't a horrible edit if the person liked it as you mentioned) from a site that looks like it was uploading these files for anyone to use.
The real problem is the sites that steal it, not the people who use the sites. I mean yeah some know the sites are bad but a lot of people are unaware that they are all stolen files.
If someone edits a file then hey they technically did make the head in a way, and we are talking about a game that has a lot of children and of course kids will try to say they made it if people like it - that's what kids do.
After all, every single head is a remake of the original template and nobody ever gives the creator of that credit!!!