This is a non-intentional server-side issue on their end, which I doubt was intentional but is how the game was originally designed to accept such character names. And how their system filters and creates accounts.
However, there is also a email registration exploit which I've made a topic about months ago asking d2jsp to stop allowing account/char name trades because it is SO easy to ninja-scam people using the email recovery exploit, but they don't listen to me. (Not really relevant, but another blizzard flaw)
In the end,
This post was edited by HighschoolTurd on Sep 3 2014 11:56pm