Well, as far as whether kooks are dealt with appropriately, I’d say it’s the general problem of people entering the Church and thinking their own ideas to be the mind of the Church, and refusing correction from the consensus of Holy Tradition. Many walk around with all kinds of ideas out of whack with Tradition. Some think divorce from other churched Orthodox and remarriage to be perfectly fine and necessary, others that same sex sexual relations or other sexual relations outside of holy matrimony are not sin, still others that women ought to be priests, some hold that the words of Christ on some issues today are not relevant, a few do think that interracial marriage is somehow bad, and even more think that a majority race ought to be prosecuted if not persecuted for imagined “privilege” and alleged inherent unconscious racism, all ideas that were never taught by the fathers. This refusal to be corrected by the Tradition of the Church constitutes sin, a failure of obedience, humility, and submission. Anything we say, including me, should be subject to such correction.I've seen only one instance (personally) of racism in the Orthodox Church and it escalated pretty quickly into an excommunication - guy simply refused repentance. The idea that there's something systemic in the Church is absurd. And 'kooks' are dealt with appropriately.
As for the Latins, they seem to only excommunicate for denying the papacy anyways.