5
Generally, we don't see any reason why you should know the passwords of your users. It is very common to use the same password on several sites - and even though it is not recommended to do, with all the places one needs a password nowadays, it is futile to think that users will use a unique password everywhere.
Therefore, "Security reasons" could be that your users are safe from you (or anyone else, who can read the database) using their passwords on other sites that you know, they frequent (perhaps far-fetched, but you know how many immoral people are out there)
Why do you want to read your users' passwords? What do you need it for?
"When you can flatten entire cities at a whim, a tendency towards quiet reflection and seeing-things-from-the-other-fellow's-point-of-view is seldom necessary."
Cusix Software
