Actually, the no return policy was made due to the amount of software coming out that was bug infested and/or had no tech support. Piracy isnt the real reason for this.
I will agree that store that refused to take the movie back has insane practices IMO. As far as computer games go, I remember when you could rent them. Then CD/DVD writers came out and that stopped immediately.
As far as the return policy goes, I tried to take some games to alot of different retailers. (Video game specialist retailers WITH used computer games.) I had manuals, most had original boxes, and no scratches on my CDs. I HATE scratches even a nicked teeny tiny itsy bitsy one bugs me... its my pet peeve.

My CDs are flawless mirrors.
Anyways, perfectly great condition games. Then I find out this was about the time this whole used computer game era was ending. There were still used ones for sale in most of these stores. Not just like 3 but more like 500. Tons. I asked what I could get for them and they all said 'nothing' they are cancelling the program or whatever. Here is the good part, I offered to GIVE them to them. (I don't like the idea of throwing computer games away. I don't know why) But I said they can have em. Resale them, make some money, gimme nothing. Nope. Perfect condition!! WTH? I thought.
I did talk to them as this astounded me as to why they wouldn't take them for FREE. The average response I got was,
"when people buy games nowdays, and it doesn't work and there is no tech support provided they want their money back. With all the companies doing this as often as it is, they were losing money by doing this as the stores get no credit as they have already purchased the game and there is also no where they can turn to for a refund."
I still have alot of old games I never play in an old file cabinet in the basement. Manuals and all. I go dig them out for nestalgic (sp?) reasons from time to time. That is where Civ 1 & 2 both are along with CTP and ToT And FW. Oregon Trail 1 & 2, Cultures 1, Dark Earth, Sim Earth, lol I actually like the drawer but I actually never play them anymore. (I wasnt selling some of them, but instead some were joined in to fill one drawer and start into the 2nd. Not to mention clean out my 'game shelf' up here.)
Anyways, it basically both of their faults I guess. The computer companies for not supporting their games for so long or its retailers. As well as the retailers that have no reason to change policy now days in case tech support ever goes back to the way it was. It would just be easier if the companies didn't hide behind this wall between us consumers and them.