How to report harassment taking place within Blizzard chat.
Reporting another player that is using an offensive or inappropriate BattleTag
How to block communication from another player in the Blizzard Battle.net Desktop App.
Information about how to purchase a gift to a player from another region.
Reporting an Exploit or Hack
Reporting your own behavior won't prevent action.
How to report harassment in Blizzard Groups
How to block communication from another player in Diablo III.
What to do if you receive this error when adding your phone number to your Blizzard account
How to report players in Diablo III.