I only download the songs because it's a pain in arse to wait till they actually sell it in the market. However, I would always buy the original CD even after I have all the songs stored in my comp to show a sign of support.

Can you imagine a friend going around and tell everyone how he/she loves xxxx but all the particular person does it only downloading the songs from the net to show support? It makes no difference for the idol to have or not have this fan. In fact, the particular fan is actually a disgrace to the idol itself.