POS customer survey machine

Seems like a good idea for getting feedback directly from customers (they use these types of machines in banks and at immigration at the airport...)

But this is the first time I've seen it in a store checkout. I'm not sure if asking all customers in line to score a specific product whether they've bought it or not is a good idea though.

I'm guessing 90% of the votes are from ppl who never tasted the chicken before...