The Sonarr/Radarr/Lidarr/etc team, and their support forums/subreddit are seriously the worst about this. Nearly every question, concern, or request with regard to torrent trackers is met with a smug response about usenet.

Assholes have started exploiting Sonarr's torrent pulling system to trick it into downloading fucking malware on people's computers, and rather than acknowledge this is an issue their users are facing and they should try and do something to help them, they've done nothing, expecting users to deal with it in their clients and through addons. The implication is if you're not using usenet, they don't care what their software puts on your computer. It's your fault for using public trackers.