But as I said, you can't expect people to ask or read descriptions :/. The average person hates reading anything
.
I once found someone putting an image of mine on mugs for profit ( that was a pain in the arse), and then there's GFX people who took images of mine, cut the backgrounds off and left the characters as a stamp or something- then they redistributed the character image to other GFX people to use freely so long as they credited them ( meaning crediting the person who ripped it off for making a cut out. Not me), then there's the ongoing battle of people uploading stretched versions of some pieces to wallpaper websites where anyone can download them ( and of course they have to credit the person who uploaded the pics, not me. No mention of me).
Then there was people claiming my art in an online portfolio on a foreign website when I can't speak Russian..( so I had a hell of a time asking the host to take it down). I do have watermarks on these- but people would edit them out as best they could. Now I've had to do more obnoxious watermarks.
etc etc
My point; see how benign it is that someone merely enjoyed a picture you drew and posted it to Facebook actually linking to you and your page?