When the barcode was first commercially implemented in 1974, what unexpected consumer reaction did retailers have to address?

The world of retail has been transformed by numerous technological breakthroughs that changed how customers shop. From humble beginnings to sophisticated systems, these innovations have shaped modern consumer experiences. Test your knowledge about a significant retail technology that revolutionized the shopping experience and how it was first received by the public. Can you identify the truth behind this game-changing invention?

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Concerns that laser scanners would cause radiation exposure or eye damage
Widespread belief that barcodes contained subliminal '666' marks for mind control
Resistance from customers who preferred manual price entry for social interaction
Protests about potential job losses for cashiers, leading to 'human-only' checkout lanes