3/ If this platform continues to grow there will always be a biggest instance and that instance will always have growing pains. I'm not saying dealing with spam from one isn't a PITA but also silencing while they work through it is a perfectly legit way of dealing with it. Maybe you decide to keep it that way. It's your choice and I respect that.
What I don't like is the fact that people seem eager to use the nuclear option bc they think that the folks on that instance are expendable simpletona