You actually wouldn’t go to jail. It is only a criminal offense if it is for commercial advantage or financial gain. 17 USC 506
The civil remedies could be up to $150,000 per work plus their attorneys fees. They don’t use cheap lawyers either. 17 USC 504-505
Think it won’t happen? Here is a case against 16 kids who were caught downloading music and identified by their school’s network. Arista Records LLC v. Does 1-16, 1:08-CV-765 GTS/RF, 2009 WL 414060 (N.D.N.Y. Feb. 18, 2009) aff’d sub nom. Arista Records, LLC v. Doe 3, 604 F.3d 110 (2d Cir. 2010)