I think the biggest thing parents need to know about this movie is they and their teens are highly unlikely to see it. It was released 2 weeks ago at 7 theaters and expanded last week to 38. It is not destined for your nearest megaplex, it’s an arthouse movie, and most folks don’t even know where their local arthouse is much less actually go there and watch movies.
Maybe parents and their teens can escape seeing the movie but they can’t escape having the trailer run over and over in front of them.