Banned for a false reason.

Long story short.
My friend got permanently banned because blizzard thought he bought/sold gold. (Exploitation of the wow economy) Truth: Did he really do it? nope. I wouldn't post this if he did. No proofs either.

EDiT:

(Sorry this is a pretty long post, but here's the story)

One day, my friend and I were logging on to raid. When he logged on, it said his account was permanently banned.
At first, he started freaking out and he e-mailed wowaccountadmin/wowgm/support - @blizzard.com asking why he got banned. Of course, he didn't get a response. So I ticketed and e-mailed the wowgm asking why he got banned.
I know my friend well. He never broke a rule in the game. The worst thing we ever do is spam. I knew this wasn't a big deal and assumed he would get his account back.
A few days later, he got an e-mail back from the wow account admins. It said he was banned because he was involved with the "exploitation of the economy". My friend and I were laughing and looking at each other like what the hell? We looked up what that actually meant and it said buying or selling gold or using power/leveling bots. This got us confused. He's never done anything like that.
He also got an e-mail from the gm I talked to saying his account is in danger and they reset his password. They also suggested him to call BILLING-SUPPORT line to recover his account.
So, he e-mailed the admins back claiming he's never used power leveling bots or bought nor sold any gold. I know this myself because I play wow next to him.
The next day he received a response from the admins. It looked like a vague copy/paste answer. It said something about blahblah we re investigated blahblah this account is closed forever. He got very frustrated and replied to them and stated CLEARLY he's never done such a thing. He also stated he's been hack about 3-4 times and character got deleted and all our guild bank items/gold were stolen. Without a surprise, they gave him the SAME copy/paste response! yay!
He also called the BILLING-SUPPORT to recover his password and asked about his banned account. They simply said "We don't deal with accounts". Okay, why don't you suggest us more false sources blizzard.

For additional information, we have been hacked about three times 2-3 months ago. We also bought authenticators. A month after we got hacked, we both received double the items and gold in our guild bank and in our bags. And yes. We sold most of those items to the auction house and made bank. We didn't really need all this gold since we only need gold for repairs, so we decided to lend a handful to a couple friends who have been BEGGING for some gold. Yes, we sent them gold from our level 1 bank characters.
If this got him banned, well, I didn't know giving your friends free gold was against the rules. This might be the only thing that might be CLOSEST to "selling" gold, but it's not actually doing it.

But yes, we've been trying to get his account back for some time now. It's very aggravating as well. He's got the same exact response from [email protected] three times and gave up. This is ridiculous. It's something to complain about. Yes QQ or whatever.