NO, I disagree with your premise entirely.
When the SHTF it is not being used in the expletive form.
It is being used as a noun to describe a terrible event and the terrible mess.
It is the easiest way to communicate a dire circumstance.
Doo-doo doesn’t seem to it justice nor does effluent.
You want the movement to officially become named as such, you want to promote the formal usage of swearing in our publications and writings, or are you talking about people just talking to each other?