Next year, a familiar site on many campuses will disappear: the tables strategically placed in high-traffic areas, offering free iPods, T-shirts and other goodies to students who sign up for a credit card.Legislation signed into law in May will prohibit credit card companies from offering gifts to college students who agree to fill out a credit card application. The legislation also prohibits lenders from issuing credit cards to individuals younger than 21 unless they can prove they can afford payments or get a parent or other older individual to co-sign.