How we deal with real-money traders

To help protect the Guild Wars community from the problems caused by real-money trading, we aggressively pursue these companies and try to stop them from abusing our players and the game. Listed below are some of the measures we take to protect Guild Wars players from the abuses of real-money trading companies.
We identify and ban accounts—typically more than 5,000 per week—being used by real-money trading companies.

We attempt to identify stolen accounts and return them to their rightful owners.

Our GMs monitor the game around the clock so they can remove botters and spammers from the game, often within hours of account creation.

When we detect a large amount of abuse from a single Internet address (IP address), we block that address from accessing the game.

We block open proxies (open Internet servers which can relay traffic from anywhere in the world) from accessing the game.

We identify players who purchase gold from real-money trading companies, and we suspend their accounts and remove the purchased gold. We also encourage these players to seek restitution from their credit card company. Real-money trading companies are not legally authorized to sell Guild Wars gold. They don't own the gold — ArenaNet does. Credit card companies know this, so buyers of gold can generally call their credit card companies and get the charges removed.

Remember, if you purchase gold for real-world money, you are funding these companies and supporting their behavior. These companies cause real grief to you and your fellow players on a daily basis. If you don't like them spamming, botting, hacking, and stealing accounts, then don't buy their gold. http://www.guildwars.com/support/rtm/rtm-en.php