There's understandably a lot of bad blood about the New York Stock Exchange's decision to merge with electronic rival Archipelago, but this is out of control... Crain's New York reports that a member of the Big Board has been arrested for allegedly threatening another member who was suing to oppose the pending deal. The incident happened in July, when there was a call made threatening to blow up the victim's car in retaliation for opposing the NYSE-Archipelago merger. The caller - who has a history of being a hothead - has been charged with one count of aggravated harassment.