[mrspeaker]

Ha ha, funny idea! After examining my own behaviour the other day I realised that if I ever owned a store that faced the street, I would totally put a microphone in the window to get customer feedback from after-hours window-shoppers: you can't solicit that kind of honesty!

[joeframbach]

At the grocery store the other day, my wife and I were deciding between a few items. The thought occurred to me that a microphone in the aisle would be huge for customer feedback! A few seconds later I realized that it would just be a feed of people yelling at their kids/spouses... not very helpful.

[wheaties]

Actually yu can and someone already built and sold a business around it to the tune of nearly $100M.