Western culture really loves its "children are asexual and have no sex appeal" fairy tale, and some people get really upset when something appears that could challenge that dearly held belief .
People of all ages are exploited all over the world, all the time, in various ways, that's just business. But a drawn loli with not enough clothing on a front page? That doesn't fly, let's start burning books again, better safe than sorry, right?
I recognise that many people who look at this part of japanese culture find it more or less inappropriate, somewhat disgusting, or just disapprove. They all have the right not to buy anything they don't like.
It's when they decide what other people should or should not buy, have access to, or produce that a line needs to be drawn - people need to be reminded that they have no authority (or at least not rightfully) over what other people do, especially as long as they stay within the law of their own respective countries.
While Amazon is no country, it's because of their quasi-monopoly that they can do something like this. In a truly free market with competition, amazon would simple lose some business to that competition if they decided not to sell something. It's because they can do whatever they want that actions like these are viewed as "censorship", as their delistings will affect total sales, which will affect total earnings of the orginial rights holder, which in the long run will affect what kind of things artists get to draw, if they want to continue working there.
I really don't care if anyone thinks "censorship" is the wrong word, but a big company is trying to limit access to content from one country for the rest of the western world, and because of the huge market share that company controls, it is somewhat successful I assume. That should be regarded as a problem, no matter if you personally approve of that content or not.
