Amazon -- which for years has maintained the standard for free returns online -- might now ban users for making too many returns. From a report:The Wall Street Journal on Tuesday documented complaints that the e-commerce giant had barred customers who had returned items. Amazon apparently failed to alert the customers that they had returned too many items before the bans. The Journal spoke with two people and cited dozens more online who said they had been barred from Amazon, as well as others who received emails from the company after returning some items. The two people who spoke with The Journal seem to be part of a wave of hundreds of people who were barred from Amazon in late March and early April, as previously reported by Business Insider.