I don't have much of an opinion on this, but I think that Copyright Law is extremely outdated and doesn't reflect modern times. Youtube is honestly extremely inconsistent with its copyright system anyways – it has the ability to prevent direct downloads from websites that convert youtube videos to MP3s but they just don't with most videos, making the whole thing seem unnecessary.
All in all, I don't really hate people who pirate their music, I do too sometimes, but usually I just listen to it through youtube. I purchase albums that I like, because I want hard copies of them. To be honest you'll oftentimes find music on albums that aren't really posted online in their original studio form anyways. For example, I currently own 4 non-compilation Supertramp albums and I would reckon that outside of Breakfast in America there are only like 3 songs from the others that are available online in the studio format. Some albums have NO songs online from them… So if you do like an artist or band, I recommend buying their music because oftentimes most people won't host the more obscure songs, even though they might be excellent too. Plus, hard copies are cool to own shades
Honestly it's kind of unfortunate since the record company still gets the majority of the cut…
I don't understand why anyone would buy digital copies though unless there was no other way to get the song.