That guy and technique notwithstanding, the appeal of "banned techniques" isn't just about bringing back the injuries that got them banned, but the fact that they were often very effective. In Judo they made some pretty controversial decisions to ban a bunch of popular moves from competition a few years ago. However they're still part of Judo. A dojo that is concerned about teaching self-defense (as opposed to just competition) might be better if they taught them.