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Re:NULL license plate not such a bright idea by dgellow on Monday August 12, 2019 @05:17PM (#20680102)
I believe that Blizzard had a limit of ~20 until recently for battle.net accounts (don't know if that's still the case).
Re:NULL license plate not such a bright idea by Tecuane on Monday August 12, 2019 @10:54PM (#20682383)
Passwords for Blizzard accounts are also case-insensitive, as they are converted to upper case before hashing. Try it!

I first found this while working on a WoW server emulator in around 2009, but I believe it's been the case since Battle.net 1.0 was launched in 1996. In order to preserve backwards compatibility, it's never been changed.