Downloading MP3 and Films

We are using internet for a lot of things such as doing homework or downloading films.But there is an argument about using internet for downloading films and MP3 without paying any money.Some people say it is very normal on the other hand other people say it isn't ethic.I think it is very common and normal.
The costs of albums and films are too high to buy them for many people.So they use internet to reach them.For example:As a student I downloaded films and MP3 for many times.Because I cann't afford buying orjinal films.And also we can reach them via internet easily.
Furthermore it is such a common event that many people don't know it is an illegal action.They don't see it is unfair and illegal.Because they aren't warned.
On the other hand according to some people,the one who downloads MP3 and films via internet is a labour thief. Also they say downloading films and MP3 without someone's permission and paying money is unfair and immoral.
I think ıf costs of the films and mp3 weren't over higher than real value,much more people could afford buying them and there could be some warning about it.