my idea is to limit the terminal’s cpu usage so that any breach does not spread quickly in the system, and maybe limit the terminal’s network access, but leave the shell out of it. idk if the last part is possible.
Begging the question is to answer the question with a premise that assumes the result. It's a form of circular reasoning.
https://www.thoughtco.com/what-is-begging-the-question-falla...
https://www.writersdigest.com/write-better-fiction/begging-t...
And to be clear, your question is a good one. It's just that it's raised and not begged. That said, I see and hear this all the time, including by historians of philosophy who are strongly familiar with logical fallacies and their distinctions.
https://www.grammarphobia.com/blog/2021/11/beg-the-question....
In this case, I tend to strongly prefer the prescriptivist view to the prescriptivist, and misuse generates confusion rather than clarity.
Words ... should mean things. Particularly when they're specifically referring to illegitimate reasoning in the first place.
"Enormity", "disinterested", and "very unique" are others on my list.
screen or tmux (or even mosh) can essentially act as a terminal firewall, as they interpret escape sequences and maintain a virtual “screen”. Then you can sandbox their process in docker or similar.
Or if you want web browser style sandboxing maybe just using Xterm.js could work.