One of the strongest theories floating around is that there are girls who Laurie is trafficking behind that door.
Though some Twitter users have made jokes about Laurie being a sex trafficker following her threats to Rue, others have taken her threats more seriously and think Rue is actually in danger.
Fans on Twitter noted they heard scratching behind the door, and other viewers on Reddit noted that Laurie's birds conveniently make noise when there seems to be noise behind the door, as if Laurie'd trained them to cover it up. Plus, when Rue's desperate for a fix because she's experiencing withdrawal symptoms, Laurie eerily tells her women are lucky because they always have something to sell, aka their bodies.