There's a sign for you wrote:
Those of you who buy 4 or 5 shoes knowing you plan to send all of them back except one are complete douchebags. Yeah Amazon offers you free shipping, but do you think Amazon pays for that? Absolutely not. In case you didn't realize the majority of the products sold on Amazon come from 3rd party sellers like myself. There is a thing called FBA and we have to pay for the shipping when you return your 4 pairs of shoes because you have no consideration for anyone but yourself.
What is happening
1) online shoe retailer undercuts local retailer
2) local customer tests shoe sizes and models at local retailer with intention to by online
3) local retailer goes out of business because they aren't selling shoes but need large staff / expensive real estate
4) local customer has nowhere to try on shoes, local customer now expects same service from online retailer by returning unwanted items
5) online retailer can't afford to offer that service with the undercut price model and calls customers douchebags for wanting it
It will be interesting to see where it goes from here,