pedophilia on tor is an extremely real thing.

https://link.springer.com/article/10.1007/s11757-023-00790-8

In May 2021, the police arrested five German men, aged between 40 and 64, who are suspected of having run “Boystown,” one of the largest child sexual abuse forums on the darknet (Connolly 2021). According to the police, the forum had been online for 2 years and, at the time it was shut down, had over 400,000 registered members.

Research conducted in 2015 found there were 900 child sexual abuse forums like “Boystown” active on the darknet at the time, together receiving an average of 168,152 requests per day (Owen and Savage 2015).

https://www.vg.no/spesial/2017/undercover-darkweb/?lang=en

It is January 2017. At this point the two have been running the Childs Play website for three months. Under their supervision, thousands of members have shared photos and videos of children being sexually abused. A Norwegian member boasted of abusing children in his own family. Some members got together in person to commit abuse, which they filmed and shared on the forum.

(This one tbf was a honeypot run by police, which is ethically fucked)

https://www.ice.gov/news/releases/secretary-johnson-announces-results-operation-dismantled-underground-child

Fourteen men operating a child pornography website on the Darknet's Onion Router, also known as Tor, have been arrested and charged as part of a conspiracy to operate a child exploitation enterprise, following an extensive international investigation by ICE's Homeland Security Investigations (HSI) and USPIS. Eleven have been federally charged in the Eastern District of Louisiana and three in other districts. All are in federal custody.

With regards to right wing nonsense it varies, the aforementioned stuff like the daily stormer has moved to tor, 8chan is on tor, there are a number of Islamic militant groups that utilize tor, etc. and the drug and fraud markets have always been around in one form or another though they come and go (whether they get busted or decide to just cut and run with everyone’s crypto once the bag is full enough)