You can use the url structure kbin.social/d/instance.com
From there you can use the block function
I don’t know if it’s bidirectional, though
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You can use the url structure kbin.social/d/instance.com
From there you can use the block function
I don’t know if it’s bidirectional, though
There isn't a way to block whole instances.I'm not sure about the second point, so hopefully someone else can answer that for you. You can suggest features here.