This is just a standard prompt hack. This will always exist with llms. They don't have any real understanding of language so safety protocols can't actually ban topics, only sets of words and phrases.

There was an extensive set of prompts working toward elder abuse before the result in question.

My guess is that the redditor who discovered it disguised it to look like homework and reproduced the hack, and added the "brother" to create more authentic rage bait.

This feels to me like the LLM misinterpreted it as some kind of fictional villain talk and started to autocomplete it.

Could also be the model simply breaking. There was a time when Sydney (Bing AI or whatever they call it now) had to be constrained to 10 messages per context and having some sort of supervisor on top of itself because it would occasionally throw a fit or start threatening the user for no reason.

This is probably just a regurgitated comment scraped from somewhere on reddit.

The preceding message is really quite an undefined input, as the user copy/pasted some questions from their assignment without phrasing it as a question or cleaning up the formatting.

I wonder what kind of outputs you would get from LLMs if you'd been talking sensibly on certain subjects then started to feed it garbage input. It feels like this might be what happened here.