Comment 13 for bug 1066225

you can have user accounts without password.
ubiquity by default installs an all-in-one / single partition.
enabling ecryptfs by default is out of the scope, due to performance impact & not desired if the desktop will be further configured to use e.g. nfs mounted home directories.
assuming that kubuntu is only by users with "linux experience" is a far stretch, kubuntu can be used by people with any computer literacy levels.

The fix for this bug has been committed into ubiquity trunk and will be available for wider testing after next ubiquity upload.