I download A FUCKLOAD of music from blogspot sites. I do this because there are tons of bands I want to check out, and thats the only means to do so, because not every song is up on youtube, nor is every band up on youtube.
This has resulted in me spending a lot of money on the bands that I really ended up liking. After downloading the entire Incantation discography, I've since bought every release. Same with Abominator and Burial. The new band I want to get shit from is Azarath; I have their discography on my computer, but I want to get the actual CD's because i like them.
I think this puts more responsibility on the bands to put out better material, because any jackshit douche bag can put together a band and release their music to the world. Does that mean they deserve my money? Absolutely fucking NOT.
Before, we had quality control via record companies, when bands NEEDED them to get their music product A) created and B) distributed. To get signed, you had to be good. So, people could take chances on cd's of bands they'd never heard before, because the band had to be good enough to get signed in the first place.
Today, with the proliferation of labels and bands and technology, the record labels aren't needed to get the physical product out. Therefore, there is no quality control. Illegal downloading is now the quality control. You want people to spend money on your band? WRITE GOOD MUSIC.
Its that simple.