And now that you have downloaded from one of their "spoofers", they have your IP address.....
I would recommend un-sharing your files for a few weeks, so if they check you, they don't consider you to be a big enough sharer to be worth going after. Cuz, in case you hadn't heard, they are cracking their whips....
As far as avoiding spoofed MP3's, stay away from the ones that look too tempting...the highest quality encoding and the fastest bandwidth. If it looks too good to be true, it probably is. Also, search for the file with slight spelling variations, compare length of the tracks, etc.
Dexter...