This seems like a great solution, does it work this way? I admit I've not delved too much into how federation works, but I assumed that when content gets pulled from one instance to another it gets replicated to that other instance, so deletion becomes problematic.
In any case, being in complete control of one own's online presence seems like a great way forward.
For me it's Stellaris, hands down, but also the Hammock album that was made for Far Cry 5 (Hammock being one of my favorite bands).