Why do people use accounts that aren't theirs?

[Draenin]

Originally Posted by Darklux

Imagine: two people play gk and are good friends reallife.
Both of them give their password to each other, so that if the other has no time, he can take items of the account.

Whats the problem with that?

The problem is that one player could give the other items that s/he needs before his/her gold time runs out, barring large exceptions, such as the other person's account being stolen, etc. But then we come back to the same issue.