A constant annoyance in moodle is the fact that a students cannot make minor changes in the profile (like a change to the email address) without being forced to write something in the Description field. In other words, moodle won't let a student save the profile unless the student has filled in something in the Description box.
It doesn't make any sense to force users to have to fill in a description as long as they can circumvent it by entering a dummy character, like a hyphen. As an administrator,it is annoying to have to keep explaining to users that the reason they can't save the profile is that they didn't enter a description.
Please allow users to save the profile without having to enter a description of themselves in the profile.