link to such law?
...it's not like it didn't happen before...
i think that the vast majority of those who pirate do it from home. those who pirate using a free wifi are probably those who live in the range of said wifi, but sure, nobody will ever try to sue somebody who offers free internet, and if they try they will surely fail miserably.
but again, most people do that stuff from home because they don't really feel threatened at all, making a lawsuit much more viable.