After destroying a user, their name cannot be changed. Here are some examples:
- http://stackoverflow.com/questions/4468248/unique-id-of-android-device/4636645#4636645Unique ID of Android device
- http://stackoverflow.com/questions/749542/icustomtypedescriptor-typedescriptionprovider-typeconverter-and-uitypeeditor/1895187#1895187ICustomTypeDescriptor, TypeDescriptionProvider, TypeConverter, and UITypeEditor
(only 10k+ and the not-extremely-easily-offended need click)
Since making a destroyed account editable would probably be a pain in the ass, I'd suggest the name of the deleted account be changed to something random, such as "Deleted" + some random number.