Anonymity is important.
This is a piece of news from Swedish public service radio today, about an org. protecting children's rights, it's called BRIS meaning "the rights of children in society". BRIS have received an increasing number of phone calls from children talking about crime, like kids being pressured by criminal gangs and such. They say that phone call anonymity is important for kids to dare to make the call.
https://sverigesradio.se/artikel/bris-hoppfullt-att-unga-kriminella-vagar-hora-av-sig
Anonymity is important to reduce crime in society.