You can also cheese it with resurrection, the raise invul blocks curtain call damage. But since everyone else is then dead you need a strategy to revive people afterwards.
Nice, that's good to know. Problem of course is can you coordinate that in alliance roulette instead of people just voting abandon as more people discover the problem.
They pushed a hotfix out for it.
https://na.finalfantasyxiv.com/lodestone/news/detail/4a5c69b15c1f8712b9a2e113e6487347d605ffbb