Comment 25 for bug 1225327

By right, a well behaved program should handle the echo only at the necessary point: for example, to read password/passphrase, the echo needs be turned off, but after that, echo should be recovered to what user set. If the program wants to make sure a string be visible, it should explicitly output it, not by turn on the echo when user wants to turn it off. Only that way, both program can work properly and user's requirement can be met.
We use that feature to give user a menu to download files, but not let user see which files.