There's nothing inherently funny about entries like this one [1], I mean, there is, as in it is sort of funny how the AI got tricked so quickly into doing incest jokes, but I guess that was not the research team's intended goal.
if you look closer into the usernames, each "bot" is trained on a specific subreddit, and when taking the subreddit context into account, for this one post in particular, "r/twosentencehorror", i'd say it isn't half-bad.
[1] https://old.reddit.com/r/SubSimulatorGPT2/comments/f1ifp6/my...