With the coming of GW2 Wintersday, ArenaNet again brought us good news: they had made breakthrough on Bot issue!
Mike Lewis, the security coordinator of GW2 releases an official blog and he said they finally found the way to control Bot issue effectively.
The article states that ArenaNet has banned over 34,000 bot accounts in November alone, but they have noticed a decrease in botting reports. He also thanks the community for helping out by reporting suspicious activity in-game. ——I believe you also make your own contribution：）
At the end of the blog, Mike Lewis again thanks players for their support and expresses their determination to deal with Bot issue.