This is not some kind of group account though, so it doesn't matter. You are only supposed to submit your own work to deviantART. dA stamps a copyright below every deviation, so by submitting this piece you have put a "COPYRIGHT TO ME, THIS IS MINE" sign over it which is not true if the creator of the piece doesn't use this account.
I won't report you, but you should double-check the dA rules to make sure you don't do something get yourself banned because of some report-happy art theft zealot who didn't take the time to speak with you first.
This says it belongs to you. By uploading something to deviantART.com, you are saying that the uploaded item is your work. You are NOT supposed to upload ANYTHING that is not your own art! The only exception to this is for photo-manipulators who use multiple STOCK IMAGES that are specifically designated by the original artist as free to use, and this piece does NOT fall under that exception.