The ethics of the matter is arguable, literally. It'd be a subject of debate. And the queues are absolutely frustrating, no doubt on that. But it is definitely not illegal. Pretty much every online game has in its ToS/User Agreement (that you agree to) that access to service is not guaranteed. Compensation, when it happens, is generally a matter of establishing good will/defusing disgruntled fans - it's not a result of legal requirement.