 The posting of the union content is in a response to the aforementioned alleged anti-union position Walmart has taken in the past.In July 2018, Walmart was granted a patent titled "Listening to the Frontend" for audio surveillance technology that could allow it to record employees as well as its shoppers.The company says the technology could help it boost worker productivity by generating performance metrics for each employee based on cashier area sounds, such as checkout scanner beeps, and even conversations.