Hacked my world of warcraft account and stole from it a couple years ago.
Actually, no, the gold wasn't the bad part. They stole thousands of high quality resources that I gathered for years and stored in my bank (I was planning on using them to level my crafting and sell them). $#*! them all, $#*!ing typical chinese hackers. I thought they were the only ones who could've done it since no one else had my password yet I used the same password from my wow account on their site (Yeah I know I shouldn't have done that), but after reading reports of trojans and keyloggers I realized that making it a different password might not have made any difference.
Yeah, I shouldn't have bought gold (Although i didn't know how to buy the expensive abilities back in the day like flying mount ability since i never knew how to be good at selling crafting), but. Dang..