So, he's swapping real bar codes with fake bar codes? I would not recommend publicly disclosing that you'll be defrauding a store. It's a lot more common than you'd think and there was even a Silicon Valley exec who recently got caught doing this: http://news.yahoo.com/blogs/technology-blog/incredibly-wealt...
http://www.mercurynews.com/business/ci_20684481/silicon-vall...
DA: "I think he also obviously had way more than any one human could possibly enjoy on their own in a legally acceptable way."