Microphones and cameras don't just pick up "what you want". A key press is more than appropriate to gather the desired "this isn't on sale" metric.
This device is also not intended for that use case. It's meant to generate metrics to "ensure employees are actually greeting." If you are SO FLUSH WITH CASH and in such a dearth of things to do with it that you are quite literally trying to optimize your greeter metrics, there is a bloody problem.
Then there is the case that the very idea borders on abusive micromanagement. The kind that can only be plausibly skated under the radar through copious use of passive voice when describing it.
Life worked JUST FINE not being recorded audio/video or otherwise.
If profit hounding is reaching such high levels, a Wal-Mart greeter can't be trusted to make a decision whether or not a customer is in the mood for a greeting, then it is quite obvious that someone further up the chain has completely lost touch with the idea of "Professional Courtesy".
Never mind that half of this metrics gathering wouldn't be necessary if the company weren't trying to out grow the problem it's trying to solve by hemorrhaging labor in favor of machines.
The modern community is rife with distrust. More and more, people drift farther and farther away from each other. Mental and physical illness become more and more serious problems as humans are increasingly expected to behave as mass-produced cogs, interchangeable, and undeviating in how they carry out their job. The human psyche doesn't cope well with that. Humans are DYNAMIC. They are creative creatures, with difference being built into every decision.
The kind of control that industry keeps pushing for illustrates that leadership has little, or deprioritizes any semblance of human respect and dignity in how they engage with labor in favor of a more attractive bottom line to attract investers.
It isn't innovation. It isn't improvement. It certainly isn't engaging with and being a fundamental positive force within a community.
It's about plopping a pump down into a puddle of untapped value and sucking it dry, to hell with the consequences for society, the community, or those we leave behind to emulate the values we clearly espoused by letting it happen unchallenged.
I don't know about anyone else, but this is disgusting behavior of a sort that deserves more than mild degree of censure.