“Promising Young Woman” is one of those films that begins with a very good idea. Ideas that involve the camera lasciviously objectifying men on a dance floor the way women typically are. Granted, it's played for laughs rather than sex appeal, since there's nothing resembling eye candy, but you can't have everything. Or maybe it's an early indicator of what the movie's real agenda is, which is condemning anyone who violates its ideas of what good behaviour should be, rather than people who suffer from such expectations. Not that it's a bad idea to condemn violence, which is the real villain in “Promising Young Woman.” In case the marketing left any doubt, the movie addresses a very specific kind of violence that dares not speak its name here.