Actress and college student Chotiros Suriyawong has been ordered by administrators at Thammasat University to perform 15 days of community service and make a public apology as punishment for wearing a revealing dress to the Feb. 9 Golden Swan awards ceremony, Thailand's equivalent of the Oscars.    The Culture Ministry also weighed in, calling the 22-year-old's choice of dress "very inappropriate" and the wrong message for a public role model to send to young Thais.  Because of the controversy, Chotiros' film production company has edited out her role in one of its upcoming movies.  "I don't want my actresses to dress that way," said Somsak Techaratanaprasert, president of the Sahamongkol film production house. "We are not a porn production house and it goes against Thai culture."