I logged on a week ago and wanted to play with my Mesmer. I saw I had a new quest in my Quest Log, a quest I did not like so I said to myself not to do it. The quest was taken. I was a bit worried, because there have been alot of people hacked these days...

Now, I was like: "Oh well, I might have just taken it without knowing it."
Now I log on back again on my Mesmer and I see the quest is completed. Now I'm worried. I'm nothing missing btw.
It's the Yak's Bend quest btw, where you gotta go to someone's tomb stone.
I might chance my password right away. A guy on this forum lost about 300k and valueable stuff and a few days later his account got hacked.