Aah funny enough I just noticed the shield icon shortly after posting that comment, Likely missed it since everywhere else it's generally hidden behind the ... menus haha.
Shield icon makes so much more sense though and yes muting does work, just the lack of global blacklists and reputation based post hiding popped up some accounts that I hadn't muted.
Would I be correct in saying that not having global blacklists and rep based filtering of posts is a design choice?
I get the feeling that per user muting is all that's really needed. The user chooses what they want to see and it affects no one else. seems like the best way to go about it.

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