I am not here for very long but I think muting posts just makes them invisible. I understand that you can keep using HIVE even if all your new posts get down-voted to 0, but I think for most people that would also be enough to give up on HIVE. That's why I suggested that communities (not front ends) maybe should have some better tools to shield their members from hostile whale accounts. That is a complicated issue, and without a doubt changes like this could introduce some new possibilities for abuse, so I'd be curious to learn some other solutions that other people may have.