Added charge to current internet fees would just be overwhelming.
Point #1: If an artist really feels it's that big of a deal then they shouldn't be in the music business, because regardless of how hard you try to govern the internet, piracy is still going to happen.
Point #2: Fans support the artists anyway. Also P2P sharing is what gets some artists discovered in the first place.
Point #3: Some record companies are a bunch of thieves. Without the record label, the artist might not be able to get their material public. And without the artist, the record company would not be able to make money without someone to make distributions for. Looks like a 50-50 deal to me. It's ridiculous how some record companies slap charges on the artist more than they should. P2P sharing looks like a way of evening this out. Why? If the artist's audio is shared, this creates potential for the artist to be supported by other means - concert tickets and other merchandising, thus the record companies do not get paid and therefore evening out the record-company-profit to artist's-actual-profit ratio. Kind of far-fetched to believe this is true for all record labels, but what I'm saying is it holds true for many so P2P in turn could work in more favor for the artist and less favor for the label, like it should.