Amazon
If you look further down the page there are a number of links, follow the 'Your Statutary Rights" one and you get the following:
"By law, customers in the European Union also have the right to withdraw from the purchase of an item within seven working days of the day after the date the item is delivered. This applies to all of our products except for digital items (eg: e-Books) where the item has been downloaded. We regret that we also cannot accept cancellations of contracts for the purchase of video, DVD, audio, video games, Sex and Sensuality products and software products where the item has been unsealed.
"To cancel your purchase within the seven-working-day cooling-off period, please visit our Returns Support Centre and print out a personalised return label for your item, giving the reason for the return as "I just don't want it anymore". Please package the relevant item securely and send it to us using the personalised return label within 30 days following the date that the item was delivered to you."
To be honest, picking out Amazon for an example of bad return handling is pretty ridiculous. Amazon are well known for being one of the best around in this area. My main complaint against them is that they have got people used to service well above their legal rights :)
I've had several conversations with customers wanting to return something on a no-fault basis well outside their legal entitlement that have gone something like:
"Well Amazon let me do this!"
"Yes sir, you may have noticed that we are not Amazon."