Account has been hacked or compromised.
Changing language settings for game and/or communications from Blizzard
How to move a game account to a different Blizzard account
Phishing scams can take many forms—fake websites, suspicious emails, and threatening in-game whispers are the most common types.
Info article detailing how to turn off a network proxy.
How to consolidate multiple Blizzard accounts into a single account.
Steps on how to create a new Administrator Profile.
How to move a StarCraft II account off a Blizzard account
Playing Blizzard games on more than one platform.
How the silence penalties work