Taboo is a shitty communication feature. Taboo demands active silence in a system with too much entropy for that to be feasible. It would be far superior to train everyone to say "good crash" (and respond appropriately) instead.
Words only have meaning in context. The whole point of instating a taboo is that you control the context. Rather than use that control to introduce danger to words, we should use it to isolate danger from words.
What you are advocating is silence, which implies confidence in the communication stream, which is the opposite of what we want.
We already knew that silence is hard to distinguish from signal noise, which is why we say copy instead.
I'm not making a distinction between silence as a pause and silence as keeping your mouth shut, because that distinction is irrelevant. In either case, nothing is communicated, because a pause is indistinguishable from a failed copy (something said that came through as signal noise).
You are advocating for the avoidance of specific words. That's a problem, because both the circumstances surrounding word choice and the signal itself have high entropy. You cannot reasonably expect the sound "bomb" to never be heard over a radio. It might be from a failure to obey the taboo, or it might be from a totally different and irrelevant signal that sounded to someone like "bomb". Signal and hearing simply don't work that way, and neither does society.
If you want to avoid miscommunication, the only feasible option is to accommodate the entropy of the communication system and the entropy of its participants.