Accounts cannot be deleted. There are lots of reasons for this.
 
If someone has played ranked games it would involve deleting the records of every game that other DGS members had against that player. Their ranks would then have to be adjusted accordingly, as would the ranks of anyone they had played subsequent to playing the deleted account player.
 
If that person had made entries in the Forum every entry by that person would have to be deleted, then someone would have to adjust all related posts for
 
User profiles are not removed (for the same kinds of reasons). They become marked as inactive, and disappear from the normal user list, but they are still there and can be displayed in the full user list.