Be careful, depending on the content. If it's a Chrono Trigger or Chrono Cross ROM, nobody's going to care, but if it's Metal Gear Solid 4, "they" might be watching. I've heard that the MPAA (Motion Picture Association of America) and the major music companies are especially vigilant these days, though they mostly go after seeders who host oodles and oodles of brand-new copyrighted material.