Not sure this is true or not.
Someone got banned for 3hours and all his BG gears being striped off for being caught AFK to many time in BG.
But gears that are bought with Arena points are left untouched.
below is the reply he got from  Blizzard.

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This account has recently been identified as being involved in actions deemed inappropriate for the World of Warcraft. This conclusion was reached based on the results of a thorough investigation and therefore, the following account action has been issued:

Account Name: **************

Account Action: 3 Hour Suspension
Offense: PvP Arena/Battleground Exploitation.
Details: Exploitation of PvP Battlegrounds and the honor system. This may include, but is not limited to the following:

*Use of add-ons, "mods", external hardware, or any unapproved third party software to automate gameplay.
*Abuse of game mechanics or "bugs".
*Any behavior that has been found to be outside the intent of these Player versus Player matches.

This action has been taken in accordance with the World of Warcraft Terms of Use (http://www.worldofwarcraft.com/legal/termsofuse.html) and our game policies (http://us.blizzard.com/support/article.xml?articleId=20309). Any further inappropriate behavior could result in penalties ranging from a temporary suspension to account closure, and may also include loss of any rewards the exploitive character has received.

Any disputes or questions concerning the following account action can only be addressed by Account Administration. To learn more about how Account Administration is able to assist you, please visit us at http://us.blizzard.com/support/article.xml?articleId=21505. To maintain the integrity of our investigation methods, we will be unable to disclose the specifics of our investigation methods.

Thank you for your time and for understanding our position in this matter.

Regards,

Account Administration
Blizzard Entertainment
www.WorldOfWarcraft.com
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Finally does this mean we will no longer have people AFK in BG? 
Make me feel good knowing that my effort of reporitng people AFK is paying off