Yes, Reddit had r/watchpeopledie, which was eventually banned in 2019 after the Christchurch shooting. It had close to half a million subs.
Reddit also has/had subs dedicated to trading sexual images and revenge porn of women (mostly Asian females) and trying to dox them, which were all still running as recently as August 2022:
Addresses, social media accounts, phone numbers and more were pieced together by Reddit users. Threats, blackmail, and related comments would soon be sent to their chosen targets.
In fact, this isn’t the work of “just” one subreddit but dozens. One subreddit played host to around 20,000 users and contained more than 15,000 images. And 150 of those were sexually explicit. It seems at least some of these images are being shared by ex-partners without consent. Others victims have been filmed or photographed secretly, and then had the images posted online at a later date.
But Reddit disallows the
truly bad stuff (disagreeing with men in dresses) so that site is Good, and this site doesn't so it is Bad.