My mom likes watching Animal documentaries. The recommendations have completely gone out of hand. Showing things like very explicit videos of animals having sex, wild animals eating people, and other terrible things...
Also with videos about cute / funny babys. It slippery sloped into explicit birth giving videos and other almost pedophilic things.

- https://news.ycombinator.com/item?id=20292108

Her daughter is into horses and so is watching a lot of showjumping videos. Apparently the algorithm keeps trying to lead her off towards increasingly bad showjumping accident videos and from there basically into /r/watchpeopleandhorsesdie

- https://news.ycombinator.com/item?id=20289302