You can be an unpleasant person without initiating force and without being a thief. What should the consequences be for bad things that may not exactly violate the ZAP? I am not one to think everything needs to be punished "officially".
Obviously, I think shunning should be used if you feel the need. That is just a part of freedom of association. Most of us use it to some extent already. If you don't like someone, you probably don't go to barbecues at their home. Where we are unable to use shunning is where government criminalizes our free choices of who to associate with.
Just remove the "legal" protections that keep unpleasant people from needing to deal with their issues. The same goes for stupid people. You can't really protect them from the consequences of their actions, so stop penalizing the rest of us.
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