Thanx for sharing this, We (security researcher) often say to people never save your password's in simple text file,it could be harmful.
Again thanks for sharing this article,a lot of people are saved by this article and they have to careful when saving their passwords.
RE: 보안의 중요성 : 아버지가 스팀에서 해킹을 당하다 - The importance of security : My father is hacked in steem.