What's the difference if you create a blog with ads, and your users started to upload ocr of books? Would you like to go to jail even though 70% of your users

What's the difference if you create a blog with ads, and your users started to upload ocr of books? Would you like to go to jail even though 70% of your users are honest and giving you a profit? If you think this is different, pls specify where the line is drawn