On Tuesday a Dutch court sentenced the programmer Alexey Pertsev to five years in prison. The court found him guilty of money laundering because the "Tornado Cash" software he developed enables criminals to carry out completely anonymous and untraceable crypto transactions (so-called "crypto mixer")
Some famous ex felon and computer hacker named Kevin Mitnick wrote some books about privacy maxing, you might want to read a few of them. I guess he's still a felon, he just served his sentence and is no longer in prison. He did legit steal some people's identity and commit wire fraud.