Ability to block specific email addresses or IPs

Being able to block specific email addresses or IP addresses from joining would be very helpful.

The reason, I would personally like this, is because I was recently in a marketing bundle for one of my courses and another person who added her course to the bundle, had her course materials stolen by someone who signed up for the bundle.

So, all of the contributors were notified to revoke this person’s access to their courses.

In my case, with using Heartbeat, I would need to change the invitation url which would cause problems for the 1000+ people who have been given that link.

Not changing the invitation url means that, the community is open for this person to join and I need to keep a watchful eye out so I can block them as soon as they join.

So… being able to block her email address(s) or IP address to stop her from joining the community would be great.