> Signals received by a PARENT process are propagated to all it's CHILD processes.

This is not true, outside of the context of process groups or if the parent implements this manually (edit: or some OS-specific features).

I gave a talk on this at RustConf this year and the video for it should be out soon, but here are the slides: https://docs.google.com/presentation/d/e/2PACX-1vQuV0pYyWQul...