Lansdale officials could soon hang up the no smoking sign at borough parks. They have asked their solicitor to put together an ordinance that would prohibit lighting up at all 21 of the Park and Rec Department properties. The smoking ban would come in conjunction with a dusk-to-dawn curfew at borough parks. Curfew exceptions would be made for baseball games and other events on fields where there are lights. The smoking ban could be in effect by the end of the year.