I doubt this would help, I think it would just dramatically increase moderator harassment but it wouldn't actually increase accountability more than a little because even if you know which mod is banning users doesn't mean you can remove them (other than through harassing them into submission).
I also don't see it as necessary or the fundamental issue behind a lack of moderation accountability. The problem with moderation accountability is that Reddit moderation is based strictly on seniority, there's really no effective way for users to protest bad moderation other than moving to another sub, and that's not really that realistic when the badly moderated subreddit has a better and more discoverable name. Admins will also rarely remove active moderators.
I also don't see it as necessary or the fundamental issue behind a lack of moderation accountability. The problem with moderation accountability is that Reddit moderation is based strictly on seniority, there's really no effective way for users to protest bad moderation other than moving to another sub, and that's not really that realistic when the badly moderated subreddit has a better and more discoverable name. Admins will also rarely remove active moderators.