Here's a crazy tip for you so you don't have to see this and whine about it every time someone uploads a post like this:
1: Click on "My Account" in the top right corner of the page
2: Click on "Settings:
3: Scroll down until you see a thing labeled "Blacklisted Tags".
4: Add the following text to the box below: "alternate_skin_color dark_skin"
5: Click the button that reads "Submit" underneath the aforementioned box.
You now will no longer see artists drawing what they think such and such character would look like if they were Black the MOST PRESSING SCOURGE ON SOCIETY: BLACKWASHING. You're welcome.