Many stores have very generous return policies, but sadly some people abuse them horribly. On another forum, there were tales of people returning lawnmowers to Home Depot in November, caked with grass from a whole season of use. Then they turn right around and buy a snowblower, which of course they'll return in May when it comes time to mow the grass!

Or the guy who returned some tires to Macy's.... Macy's of course doesn't sell tires, but the customer was obnoxious enough that eventually they had to summon a manager who was able to look up the price (at another store apparently) and then gave the customer however much money that was.

Worst I've seen personally was the guy I used to know who was constantly buying expensive stuff, then returning it within the 30-day return window. Like fancy high-end DSLR cameras.... Every photographer knows of B&H Photo, right? This guy would buy a new camera and lens, take it on vacation with him, then promptly return it the day after he got home. Or sometimes he'd buy expensive items, like leather jackets for example, but he'd get buy two sizes. He'd wear both for awhile and then return whichever one didn't fit as well. Somehow I doubt any of this stuff can get put back into inventory as "New".

He's now a small-business owner himself. I wonder how he'd feel if his customers did the same?