Fraternization

From Memory Alpha, the free Star Trek reference

Fraternizing refers to inefficient interaction between humanoids. (VOY: "The Gift" et. al.)

Among the Quarren, efficiency monitors prevent employees from fraternizing. Seven of Nine, while brainwashed and serving as an efficiency monitor, prevented the also brainwashed Kathryn Janeway from doing so with Jaffen. (VOY: "Workforce")