A team of researchers from a Brazilian University of Campinas in So Paulo, Brazil, has had its Tor relay node banned because it was spotted collecting the.onion addresses of visitors. Researchers were working to develop a tool that could identify malicious. hidden services. The activity conducted by the researchers is a violation of the Tor Projects ethical guidelines and triggered the banning of the node. The team set up a Tor relay to collect specific data about the hidden services. The research will go on in any case, with different techniques.”]
Source: https://securityaffairs.co/wordpress/62388/deep-web/tor-relay.html