Those harboring horror film history will have a sixth sense of what you get when it’s Kevin Bacon plus sleepaway camp: it’s not a lucky day for the teen participants. John Logan’s new film They/Them (B) is pronounced “they slash them,” and although it’s sometimes more effective as social commentary than horror movie, it’s often a riveting and surprisingly sensitive psychological adventure. Theo Germaine is absorbing as the non-binary protagonist in a talented LGBTQ ensemble, with Anna Chlumsky and Carrie Preston among the standout counselors at an outdoor conversion camp further complicated by the presence of a masked killer. Kevin Bacon is solid as the seemingly mild mannered but possibly sadistic camp leader; the actor clearly liked the concept enough to be a behind the scenes producer as well. The body count is punctuated by sterling doses of intimate drama and even a jubilant singalong to a Pink anthem. Just when folks thought it was safe to be out of the closet, this twisty tale provides refreshing riffs by the queer and loathing, especially when the usual roles occupied by damsels in distress are  magnificently reversed and empowered. This is unexpected fare in the streaming wilderness of late summer.