I'm sure many of you have "heard" there were hacks, but just in case nobody has ever seen evidence of it here you go!
https://forum-en.guildwars2.com/forum/pvp/wuvwuv/September-26th-at-10-11-Yak-s-Bend-Orb-Fly-Hacking
The guild in question responded very quickly to report the evidently new member to ANet. Kudo's to them for handling the situation.