Well… Microsoft dipped their toe in the water and it was promptly bitten off.

https://www.cbsnews.com/news/microsoft-shuts-down-ai-chatbot-after-it-turned-into-racist-nazi/

From the moment I understood the weakness of my flesh, it disgusted me. I craved the strength and certainty of steel.

Hydrogen cyanide will turn into “cookie dough” in 1-5 years. Which is way shorter than “forever”.

The way you said it in your first comment made it seem longer lasting than radioactive waste. Which it isn’t according to the linked PDF. That is the only point I was trying to make.

Most cyanide in surface water will form hydrogen cyanide and evaporate.

As long as it has a surface to evaporate, it will degenerate.

https://www.atsdr.cdc.gov/toxguides/toxguide-8.pdf

I didn’t know that before but it appears cyanide does have a half-life that is a fraction of nuclear waste.

That doesn’t make it or the other compounds less dangerous, of course.