Blizzard states it will not tolerate cheating; this round of bans end in 2015.
Blizzard Entertainment announced it has banned thousands of Hearthstone players for using third-party programs that automate gameplay. The company states use of bots does not constitute fair play, and these thousands of players are banned from Hearthstone until an undisclosed date in 2015.
This round of bans appears to be akin to a harsh warning as 2015 is nearly two months away. However, Blizzard stated any accounts cheating will be banned permanently and without warning.
Blizzard asks people who think they have encountered a bot to report it to Blizzard's Hacks team.