STEVENS POINT, Wis. (AP) Despite defeating a proposed smoking ban at city restaurants and bars, a group of businesses is continuing its suit against a college professor for offering extra credit to students who helped promote the ban. University of Wisconsin-Stevens Point professor John Munson sent an e-mail from his university account in November to students urging them to patronize non-smoking establishments and collect signatures to put an anti-smoking referendum on the ballot. In exchange, he wrote, the students would get up to 1,500 extra credit points. Although the referendum lost at the polls by 1,000 votes on April 5,...