1- Drag an image into a folder with images. 2- Try to drop it over one of the images in the folder. Result: It shows a "prohibited circle emoji" and doesn't allow the images to be dropped. Expected Result: These files being non-interactable shouldn't prevent the images from being dropped into the folder.
It's not very useful to have a "you can't do that" in a place you can do something else.
This seems to be pretty niche, since it's very easy to drag a file over an area that isn't another file easily. I'll pass this along for consideration, tho.
It depends on the size of the window. Something like 🚫↷ could be used to indicate that you can't interact with the item, but the item will be dropped in.