Bill Singer, writing in Forbes, has coverage of some interesting raiding cases. (Forbes) The post has links to his previous coverage of raiding cases.
Of particular note was an excerpt from a 25 page reasoned award in a Fidelity v. Morgan Stanley Smith Barney matter:
The conduct engaged in by MSSB in this case represents an unfair method of competition in the securities industry precisely because it attempted, either explicitly, implicitly or through nefarious and surreptitious means, to impose upon Fidelity, a non-Protocol firm, rules of commerce by which it never agreed to be bound. This isn’t fair competition; it’s an illicit and improper rigging of the rules — a stacking of the deck — to favor one competitor over another.