We already know that Blizzard is tweaking arena rules to make it much tougher to artificially inflate your rating by win trading or buying high ranked teams in Season 4, but it looks like they're starting to take it one step further, by cracking down on people who indulge in it.

Reports are coming in from the official forums and from other spots around the web of people getting bans or suspensions (generally 72 hours in length) and having their Season 3 arena gear stripped. The bans are even permanent in some cases, such as that of Sinther of Stormscale, whose account was permanently banned when his friend used it to do some win-trading, with the win trading given as the specific reason for his banning. You can read many of these stories and reports in this forum thread.

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