As a teacher, I've had a couple instances where I've needed to remove a student from class - as a way to inform them of the reason, if there could be a message from organizer for the reason they were removed, would be beneficial.
It there is a possibility of being able to add a link or file while doing that would also be a way to give them a 'think sheet' or processing form or document you want to accompany the message would be nice.