IT workers are usually trusted by their family members who readily share passwords (Facebook, email, twitter, you-name-it!) so they can get easy help to set what-ever-parameter they don't find or explanation of a challenging situation.
I always try to convince and explain why this is a bad practice and that I do not want to know their password. However, I usually fall short on argument when I get answered "But I know I can trust you" or "I know that you will not use this for evil acts" to which I can't really reply "You don't know" as it would imply they can't trust me (remember, they are family members).
What list of arguments (the longer, the better) do you use to explain the risks of having such bad practice?
Here is my own small list:
- That's a bad practice and you should not trust anyone with.
- That's not respectful for the people sharing intimacy with you (you gave me your Facebook password, I have now access to all the very personal details of people that trust you and not me).
- That's a responsibility I do not want that you force on me.
- If I use this password carelessly (i.e., without checking over my shoulder) someone can read this password and I would be the one that leaked it.
Most of them usually don't understand, become suspicious or just assume that we are just paranoid.
Please, avoid cases when harm is done using passwords. While this is mostly funny or creative, that does not answer to my answer where people trust you and this must be kept as is. Note though, that the comments stating you didn't realize they'd find what you did a problem or changing the password by a secure one and sending the password reset link are somehow valid in a way ;)