There is an uproar about people getting banned for 72h with all their arena points and all S3 gear being removed. All I can tell is:

FINALLY!

However, there are stories flowing around forums with people claiming they got banned when they did not win trade, I was sceptic about that at first, but in one long topic on Arena Junkies, one guy pasted an email from Blizzard:

Hello, XXXXXX.

I wanted to give a quick followup on the situation. It seems as if the actions made on your account were in error. We do apologize for this situation, as our intention is to clean up the rampant win trading going on, we did encounter a few mistakes along the way. Unfortunately your team was filtered through association, and was tracked and actioned due to an error in judgement. I apologize for that.

The items removed from your character have been restored and should be in your mailbox. Your points should also be returned as well.

Reply to this email if you have any other questions. I realize you will probably question the status of your friends, but I will take care of them.

Regards,
Vlaynoss
Senior Account Administrator
Blizzard Entertainment
www.worldofwarcraft.com

And to back this up, screen shots:

Time to get paranoid?

Terhix