If I rename an user that happen to be currently blocked, the blocklist doesn't
follow : there's still the block with the old name (a fanthom block, since it
does not correspond to an existing account anymore).
*aaaaa is blocked
*aaaaa is renamed to bbbbb
->"aaaaa" still appears unchanged in the block list
You ask, why the hell renaming a blocked account ? well because, it's because
they're containing insults (often against sysop, religion, ...)