Well, I for one feel that i support the scene enough. I have a lot of downloaded music, but I also buy around 20 cd's a year, more than, say, a 60 year old man who doesn't download at all (thus being completely legal) but neither buys anything, except the occasional jazz cd his wife gives him for birthday present.
So why can't everybody (who can afford it) just start buying AS WELL AS downloading (I know it's impossible), to support their interest?