How to remove your DeviantART account
Apparently not everything is removed from DeviantART, as stated on the removal page, which is actually a ‘deactivation’ page.
Also, have a look at their little sniff sniff message in their FAQ: http://help.deviantart.com – it’s funny (and sad).
Direct removal link: https://www.deviantart.com/settings/deactivation
Helpful Trick: Removing online data
Helpful Trick: Remove third-party logins
If you signed up for DeviantART using a third-party login such as Facebook or Twitter, you probably want to revoke all access from DeviantART. Click here to find out how.