I'm a bit torn here. I'm generally against speaking ill of people who have just died, but on the other hand, as Ben noted, Breitbart was a pathologically dishonest and arguably racist propagandist who ruined careers of innocent people and targeted organizations that served the poor and minorities. It also seems he had some rather choice words in the immediate aftermath of the death of Ted Kennedy, so I really see no reason to show sympathy. There are others who have died recently who are far more deserving.