"Those are done purely out of someone's love of a particular artist, and it's hard to fault anyone for putting a song on so they can share it with their friends."

Is it? Misplaced "love" is often a violation of copyright. I believe anyone using an artist's music should ALWAYS obtain permission. Just because a fan thinks they are sharing the love doesn't mean that the artist would see it the same way.

The same rule should apply to text on websites: just because you read something you like or agree with (or wish you'd written), doesn't mean you have the right to copy and paste at will - especally if you don't even credit the original source.

The whole concept of intellectual property seems to have been wilfully abandoned on the internet.