I know that I, as a consumer of goods, receive many emails and sometimes wish I could unsubscribe from a certain promotion but want to remain on the company’s overall mailing list. This would be a great tool that would allow students to opt out of event emails (for one example) without being removed from all future emails.
One way to potentially implement this would be that the unsubscribe screen automatically unsubscribed them from the campaign and has an option to be removed from the institution all together.