Can't return generator that was never used for a bigger one. Why?

I learned that when the storm comes the have a slightly different return policy on generators. Some people buys generators use them for a week and since the power comes back they want to return it and get their money back. We were told one guy said he never used it and had it really taped up so they open it to check and it gaf gas in it. This policy is good and bad because it hurts the honest people but it also prevents them from selling something used as a new item. Also keeps people from getting free use of something that could be rented at big box store like home depot.

I Don't know what their return policy is. Did you see the manager?