Perhaps my example is only slightly related, but...
When you live in Switzerland, it's possible to order books from Amazon.de, where books are generally cheaper due to a favorable exchange rate. Not only that: Amazon.de automatically deducts German taxes from the total cost, shipping is free, and there are no customs on importing books in Switzerland. Is it morally right? I never thought about it. But it sure is very convenient and saves quite a bit of money.