Got duped into giving my login info to a dude who promised to put money into my bank. Lost my account for like a week, and when I finally recovered it, they had taken what little I had. I cried.
Runescape as a child was a good place to learn life lessons
2 minutes to realize I couldn't log in because someone else was logged in as me wasn't an error. 3 minutes to realize and verify the login page was a clone. An eternity to change my password immediately. The bot had already handed off 1.6B in gold, my many many feathers, lobsters, swordfish, and ores. Probably my armors too. Never even left the Grand Exchange. I raged and then I cried. Haven't played it since.