UPDATE – In the original version of this story, we did not make it clear that hackers are accessing player accounts with user credentials stolen from outside sources. We've reworded the story accordingly.
ArenaNet's Guild Wars 2 is roughly a week old and already thousands of its players have had their accounts hacked. According to the Guild Wars 2 Wiki: hackers obtained more than 11,000 player passwords "stolen from other games and web sites, and collected through spyware, and are systematically testing Guild Wars 2 looking for matching accounts."
"Over the past three days, we’ve received approximately 8,500 new support tickets related to hacked accounts and other blocking login issues, and we’ve resolved issues to get approximately 9,500 players back into the game (most from tickets submitted prior to Friday, August 31)," wrote staff from developer ArenaNet on the Guild Wars 2′s wiki. "We’re aggressively ramping up our customer support team, with 28 new support representatives starting today and more coming online in the next few days, to provide the fast response times our customers expect."
ArenaNet went on to say that it is prioritizing all customer support tickets related to hacked accounts submitted before August 31. This is particularly dangerous if Guild Wars 2 players use the same password for multiple services, so changing your password now and using a mixture of letters, numbers, and special characters for your new password might be a good idea.
Find out more on the Guild Wars 2 Wiki.