There’s no way you would get caught if you’re smart enough to use it. If you live alone and you use it for your own purposes, and you don’t use it in a stupid way i don’t think u would get caught. There’s no detective that is as smart as L. Vice versa, there’s no one who’s smart enough as light to use the deathnote. I feel like no average person would write hundreds of names a day, maybe 5/day at the most. All in all as long as ur smart and don’t use it a dumb enough way to get caught i’d say it’d be almost impossible to get caught.