Not back in the day, when Icahn was running the Southeastern Queens Chapter of the Jewish Crips and not today, as the elder hedge fund manager presumably maintains ties with the organization, whose members stay current on his various investing nemeses and won't hesitate to fuck someone up.
The Pershing Square manager will never be free of this guy.
When Mark Hughs founded a multi-level marketing company called Herbalife in 1980, he probably thought it had the power to do a lot of things. Help people lose weight. Makes others rich. Shake up the diet industry. What he mostly likely did not expect, however, was that his li'l company that could would reignite a feud between two billionaires that would devolve into a flurry of press releases quibbling over who was dying to be friends with whom, shouting matches on live TV, and, we predict, someone telling someone else he has a right mind to "Rip the eyes out of your head and piss into your dead skull! You messed with the wrong hedge fund manager!"