One thing I want to clarify. Use of personal email does not technically subject all your personal emails to OPRA, only work ones. If you have an actual email that has both work and personal stuff in it, you can just redact the personal stuff. If you are doing government work on a personal email, and an OPRA request is sent for materials on it, what you'll probably have to do it submit a log showing what emails are not provided noting that they are a) not responsive to the request; and B) personal, thus not subject to OPRA. That log itself is not a public record (odd, I know), but it would be what either the GRC or the Superior Court (where OPRA Denials can be heard) that may review them in camera.
Just wanted to clarify. Not all of your personal emails on a personal account are subject to OPRA, even if you use your account for public business. Only those emails related to public business.
So...if someone OPRA'd the university for an email contacts between coaching staff and professors, they should just ask for emails sent from university, as well as public addresses. and because the report contained the emails Flood sent (with identifiers redacted), the university has waived further ability to deny similar emails. They can still black out the identifying info for privacy reasons, but the fact that emails exist from this coach or any other coach, if they exist, wouldn't be hard to find.