Is terribly wrong to think it a weird vibe for someone to ghost on (or openly drop from) their own RP and get upset if the people that joined decided to press on in some way, shape, or form? 

If one is either too busy or too unmotivated/disinterested (especially the latter), why even care? Why fret over "losing control" over something that you've decided not to see through to the end? What's the thought process? And frankly, what's to stop anyone to pick up where tbings left off, or to reboot the idea? Last I checked, there's no rule explicitly banning that practice. How far do you go to keep your idea dead once you decide to kill it?