Where the hippie guy got stabbed and cut up to death and the next minute he was fine? That's what happens to people who die in the house.

Maybe Violet really isn't dead, but her being fine in the next scene would make more sense if she did become a ghost.

Plus they can all comunicate with ghosts. Constance talked to them in past episodes, Ben was having conversations with Hayden last week, Vivian had sex with one. Even Crispy Larry can talk with them. Hell, that random Persian dude got a BJ from ghost Moira.