Another grey area: cover versions. Do you play any covers in your live sets? In terms of the law, you ought to be paying a publishing royalty to the artist in question. Now of course, nobody does this and musicians by and large don't feel they are losing any kind of revenue streams from, say, buskers. Personally I'm glad that an artist's control over their product is not taken so literally that the PRS start policing gigs to recoup publishing fees over covers.

A myspace page has some songs up for people to listen to? Fine, it's not denying an artist a revenue stream and garnering them some exposure. A musician might still be against this on the prinicple that they haven't asked his/her permission. But it's borderline perverse – verging on a desire to actually veto who buys your CD. It rather begs the question, are you sure you wish to make your music public in the first place? Presumably, nobody posting here would have an objection to a listener playing your CD to a friend?