"We urge the person involved to come forward and give his statement," he said.Mr Md Ariff, 34, a Bangladeshi staff at a restaurant in Kota Kemuning said most customers quietly stepped outside to smoke when reminded of the new ban. "It is still new, so sometimes they forget. We remind them and there is no problem," he said.Mr Khalil, 40, from a restaurant in Taman Sri Muda, Shah Alam, said he had some unhappy stares from one or two customers but everyone complied with the new ruling.Several restaurant associations said generally, customers have been understanding of the ban, save for a stubborn small group of people. "We have customers who are a bit stubborn and reply rudely to workers, but we told our workers to just ignore them," said Malaysia Singapore Coffee Shop Proprietors' General Association president, Datuk Ho Su Mong. "Most of the customers are conscious of the new ruling and walk away to the roadside to smoke," he added, saying that business had been affected by the new ruling.Malaysian Indian Muslim Chamber of Commerce and Industry president, Datuk Jamarulkhan Kadir, said it had yet to receive any reports of aggressive customers.