Very Interesting Question ..

I like all of the above posts for different reasons.
I think that it is a very complicated issue...Often Legality & Ethics do not go hand in hand.
Personally I could generalise and say that I am Anti-piracy,but I think that it depends on whether the specific system that governs the "legal" route is more ethical than the "illegal" route,or the "grey area" in between.
I am Anti "Movie Piracy" as I think that to own a legal copy of a film that costs $100+ Million to make ,for only approx £10 is a bargain.
I am Anti "OS & Software Piracy" as I do not see a need (certainly not in the UK anyway).. I have never paid for an OS or for any Security Software because they were all free anyway..
When I Gamed I always payed for the games (although I do think that they are over-priced)
IMO The Piracy that has the biggest ethical "grey area" is TV..
I consider the legal Subscription systems to be extremely unethical.. One would need to have a massive disposable income to be able to watch ones personal favourites of EVERY program available..
To have to subscribe to watch exclusive content/programming from Netflix ,Hulu ,Amazon ,Sky ,HBO...etc would cost a fortune,and it is ethically wrong in my view that only the rich could watch whatever shows they wanted..
If ALL shows of ALL services could be payed for individually then I would have a different view.
...Having said this,I do not download & distribute TV content as that crosses the morality line for me.