<p>MAYOR Bloomberg's harsh anti-smoking law - already rubber-stamped by the City Council - could result in the loss of many national conventions, starting with the Republican Convention in 2004. James G. Tom, of NYC Citizens Lobbying Against Smoker Harassment, has written all 51 lawmakers warning he'll call for a Republican boycott. The group fumes that the GOP is supposed to be the party of personal freedoms, lower taxes and less government: "The smoking ban goes against everything the Republicans are supposed to stand for," Tom said. "Why would convention delegates who happen to smoke want to come to New York?" Good question.</p>