The real problems arise, says Levy, when monitoring that starts out rational or even beneficial begins to slowly creep into a different territory, making workers uncomfortable. “The issue is often that once you're monitoring for one reason, it's les onto that,” she says. “If, for example, you have to do some worker monitoring that's legally required, it becomes very easy for that to justify much more surveillance and analysis of workers' performance in the name of productivity or efficiency, because often you can use the same technology to do both.”