Despite all the handwringing here, there's no concrete proposal for what to do with rent-seeking attention-seeking deliberatvely difficult individuals whom one has no obligation to entertain the ideas of.

If I were NYU, I would simply never book Milo Whatever-his-name-is. Having to deplatform him indicates that someone wanted to platform him in the first place. Kick his useless ass to the curb/kerb, as the case may be.