* Can we expect mega corps to go "Hey, this loophole would allow me to only pay 50 euro in tax completely legally, but I think I'll pass on it this time"? In a profit based economy, it's expected that people will try to maximize their profits/minimize the tax that they pay within a certain framework. If Apple did nothing illegal, then it's kind of hard to say that they did something immoral. Or at least it's complicated.
* If we're ignoring legalities and only talking about what we like and what seems 'fair' to us then yes, Apple has a dirty history of using Eastern child labour, etc. But at this point, it's also ethically complicated about whether it's worse for Apple to have these few billion dollars of if they should go towards EU coffers to finance the bombing of the Middle East, etc.
I'm not advocating a pro or anti Apple stance here -- but I think most people in this thread are oversimplifying the case to the point of error, hence my original remark.