Rogue ninja - coincidence? I think not!

Ninja's name - Addzkimist (60 Human Rogue, <Flashback>)
So, me along with my 2 guildmates and 2 random dudes who are friends irl ran Strat live. We killed balnazzar and then the impossible happened. 2 random blues, the epic pattern and the flask recipe dropped. I told the group to Need roll if you can use the recipes, greed roll if you wanna sell them. The flask recipe was won fairly, however the truefaith vestments pattern got ninja'd by one of the random dudes (the rogue) claiming he has tailoring, which either way proved useless to him. Later i've noticed him selling the pattern in the auction house.
http://i.imgur.com/n22rwAu.jpg This is the loot drop.
http://i.imgur.com/XF2Xq6U.jpg This is the guy actually selling the pattern on AH.
http://i.imgur.com/meIqI06.jpg Our /w chat... if for some reason you're still unconvinced...
So, me along with my 2 guildmates and 2 random dudes who are friends irl ran Strat live. We killed balnazzar and then the impossible happened. 2 random blues, the epic pattern and the flask recipe dropped. I told the group to Need roll if you can use the recipes, greed roll if you wanna sell them. The flask recipe was won fairly, however the truefaith vestments pattern got ninja'd by one of the random dudes (the rogue) claiming he has tailoring, which either way proved useless to him. Later i've noticed him selling the pattern in the auction house.
http://i.imgur.com/n22rwAu.jpg This is the loot drop.
http://i.imgur.com/XF2Xq6U.jpg This is the guy actually selling the pattern on AH.
http://i.imgur.com/meIqI06.jpg Our /w chat... if for some reason you're still unconvinced...