They also don't like people downloading them to begin with, and know it happens, but without additional public posting they pretty much never know.
ASCAP and BMI have teams of people roving the country looking for businesses that play music to bust. You cannot... legally... play the radio (where customers can hear it) legally without paying royalty fees. The fact that the radio station already paid their fees, or that it was available "free" on the radio, will get you exactly zero sympathy in court.
Restaurants sued for playing music without ASCAP/BMI licenses | Law Offices of Gordon P. Firemark - Top Los Angeles Theatre & Film Entertainment Lawyer
Note to self: I am so going to have to remember this thread when some of the more pious and self-righteous on other issues spout off regarding being law-abiding and/or ethical.