have defined profiles of moderators (or teachers) and users (or students)

I think that the profile of the users should be chosen at the time of creating each user or that the administrator can define the moderators (teachers) and that by default the others remain as users (students)

the "personal.rooms.enabled" configuration item allows you to create events but to all users in general I think it would be more useful to have defined profiles of moderators (or teachers) and users (or students), for example users (or students ) in general they should not be able to create new events, but teachers can. 

Another example, that students (users) cannot move, delete files from the group (only moderators (teachers) should do so.