They only usually do name changes for capitalisations and such.
Yep, the admin will snip off a number, change an underscore to a space, adjust your capitalization, or other minor tweaks but they won't approve a total or partial name change. They also won't delete accounts, it messes up the database (all of those posts get listed as belonging to anonymous members and if that wasn't bad enough in and of itself it tends to result in PMs asking how this happened).