When a user is enrolled in a course and their enrollment is limited to a section they should not have the option to add a discussion for 'All sections'. Instead they should be presented with a default option of 'All my sections' and then the post should only be visible to users in the relevant sections.

We are trying to set up a peer mentoring course and want to limit enrollment so that the mentors can only interact with their allocated mentees, however the current functionality has meant that we won't be proceeding with this solution at this stage as the likelihood that a student mentor will ignore our advice and just post a discussion to 'All sections' is very high.