Anything is possible at this point. Even the administrator of Kiwi Farms is expecting APNIC to revoke their /24, because the Twitter mob has been very vocal of who their next harassment targets are.
Yes, and they actually already discussed such a possibility back when the Daily Stormer first moved to Tor[0].
They ultimately shot down the idea, and just put out a statement condemning them instead[1][2].
I think it's unlikely they would implement such a thing for KiwiFarms now that they've already set the precedent with a site that is arguably much worse.