Aren't there consumer protection laws against this sort of thing?

Update: I guess it varies state by state http://consumer.findlaw.com/consumer-transactions/customer-r...

Minnesota, where I (and Best Buy Headquarters) are located requires:

"A seller must clearly and conspicuously display written notice of its policy in boldface type of a minimum size of 14 points. If a seller fails this requirement, cash refunds are required of goods that are acceptable for return."

Also, couldn't fraudsters circumvent this entirely by paying in cash?