well, I did read they are going to track who is sharing music files and sue them.
in the first place, that's easier said than done. Fist of all it can have legal implicancies, it's hacking into someone's personal computer. It's like to say "I suspect this guy has stolen something mine so I am gonna look into his house to see if he has it", that's not acceptable without a court order, if somebody challenges them legally and it becomes a court action it could be the end for them.
Second, get a firewall, but a hardware one (not bullshit like zonealarm), a router with a build-in firewall would do it.
Third, all they can do is to obtain your IP address, unless they intend to look some other info inside your computer which is illegal. With the IP address they have to ask the ISP and the ISPs don't want to collaborate (remember the Verizon case). Of course the court can order them to do that but at the end, the phone companies are a lot more powerful than the music labels and the legal battle can delay this for years, when it's over the record companies can be history.
the music labels are managing to enrage everyone, the combined IQ of their executives is less than 20, they have angered the people that buy music and the piracy levels have increased rather than decrease, they are desperate and IMO have no clue about what to do, these are desperate measures and I don't think they are going anywhere with them.