I have so many mixed feelings about retail return policies after 25 years in the business at 5 major retailers.
First, I would agree that there are policies, and there are exceptions. I am much more likely to make an exception for a customer who brings in (I am brick and mortar) receipts, and possibly the garment to ask for the adjustment. And if they are nice and polite - especially to the sales team. Rudeness reverts me back to the policy very fast in defense of the front line team.
Second, having worked within an experimental "we will take anything back anytime" policy last year which now has changed to some fairly strict guidelines, I didn't see too many more "abuses" than we do now. But, we also had everyday low pricing so no adjustments were needed. Needless to say, we all know how that experiment ended up. I guess US consumers would rather play the sale and coupon game which is really rather silly imho. So much better off before for price but no one could see that. As far as returns go, we have people who obviously have found items (with tags on) in closets and want to return a year or more later. If the item is still in inventory, we can return w/o receipt for a store credit. I did have someone upset at me after I made that offer for her and she demanded cash. She really wasn't into the compromise. She called corporate and they told her she was lucky I made the exception at all.
Third, as a consumer, I would ask for a price adjustment if it is within about 30 days. That seems reasonable. It isn't right to buy a winter coat, wear it all winter and ask for price adjustment at end of season. That's just me.
Fourth, if you ask and they agree - no guilt needed! Companies have policies, training and supervisors to hold team's accountable to their expectations. Don't feel bad if they bend the rule for you - it's a win win most likely.
Ok - long winded - sorry! I hope you ask for the adjustments. Everyone should be as educated consumers as you all are as it would make retailers jobs so much better