As the articles’ title notes, an interesting Q&A has been published by BBC News regarding the possible suing of individuals by the RIAA and the state of digital music.

Could I be sued for swapping a few songs?

Theoretically, you could. But the RIAA says it is suing file swappers who have consistently trade large amounts. 

It recently took action against a college student in Michigan who ran a network offering more than 650,000 files – the equivalent of more than 43,000 albums. They have chased other users who have again uploaded thousands of files.”