@keith It could be a cat-and-mouse game, or server admins might put plenty of effort into keeping them out. Some people have praised admins on Masto for being quite decisive on this, though I feel only time can tell whether this will stick.
@kie
Yes, I feel that ultimately, the logistics of administration is going to be the crux of it all. Both the human resources required for... what can we call it? Social administration? and the tech resources required to stay online and scale. (computer hardware, electricity, etc)
Which to my mind is one more reason to keep your instance small!
Best case scenario here is that somehow #mastodon instances remain small, community based, serving to bring people together rather than keep them divided in fear, with just the right amount of cross over to stop filter bubbles. something that always would elude twitter.