NEW YORK ( MainStreet) -- Let's just get this out of the way: We love online shopping. The ability to shop from the comfort of your home is one of the greatest innovations of the Internet age, allowing you to browse, read reviews and compare prices without ever having to leave the house and deal with pushy salespeople. The increasing ubiquity of smartphones and tablets means that you can do your shopping wherever you are, whether at work, in the bathroom or on an airplane. And best of all, online retail prices tend to be significantly lower than what you'll find at bricks-and-mortar stores. With that said, online shopping does have its downfalls. Select classes of products are still cheaper to buy in stores, for instance. The lack of sales tax, previously one of the big selling points of e-commerce, is ceasing to be a factor as more states pass laws that tax online purchases. And while free shipping is common, the shopper is still on the hook for the cost of home delivery in some cases. Those are admittedly just minor gripes, and rarely derail us from buying online. But there are other things about shopping online that we simply can't abide. Here are a few.