Sing a song, go to jail?

http://torrentfreak.com/copyright-threats-against-compulsive-singer-withdrawn-091021/
Copyright Threats Against Compulsive Singer Withdrawn

The UK’s Performing Rights Society (PRS) charges for all copyrighted music played or performed outside of an individual’s home.

How many laws / regulations are you violating if you are walking down the street and singing your favorite song?

Well, at least it is not a crime yet to walk down the street.