I've noticed as well that in grocery-store lines. Where customers are being conditioned to patiently wait in long lines to be next at the checkout machines. To wave their purchases over lasers, then pack them into each and every bag they'll pay for. Be careful what you put in the bagging area! the machines' metallic voices shriek at the customers. They must do exactly as they're told. Or else the single human attendant will walk over to ask them what they did wrong. While others still waiting trade impatient glances. Oh the shame.
Meanwhile the silent rows of unmanned registers wait in the gloom, just in case. Are they waiting for an EMP?