If you are faced with a situation where you would need to interview someone you know - either someone you like or someone you dislike, it doesn't really matter - you will have a bias towards that person, either positive or negative.
And that alone is unprofessional.
If a friend, relative, spouse, ..., of yours is to be considered for a position in your company - would you favor them in detriment of other professionals? That wouldn't be professional... it is okay to refer someone to your company, but you need to disclose that information. And you shouldn't be the one doing an interview.
The same applies for someone you dislike for personal reasons. You should disclose the fact that you know them, mention you do have a bias towards them for personal reasons. Should management ask for additional information, please, share the aspects you feel comfortable sharing, but keeping in mind you need to keep the hiring process fair to the candidate, to yourself and to your company - every story has two sides to it, and if you are the only one sharing your point of view - you may influence the hiring process in an unfair way.
For fairness and professionalism's sake you should mention to management you wouldn't feel comfortable doing the interview and excuse yourself from the process. Let them assign someone else to the interview if they still want to consider that person.
It will be professional and a strong enough message on your ethics. It will at the same time make them pay close attention to everyone in the hiring process to make sure they are a good fit to company culture and won't bring more trouble than benefit for your company, keeping it fair and a healthy workplace for everyone.