A study by a major U.S. adoption research group calls for "targeted laws, policies and practices" to stop adoptive parents from giving their unwanted children to strangers through the Internet. The report, released by the Donaldson Adoption Institute this week, also says problems exposed by a Reuters investigation in September "should be seen as the tip of an iceberg of unmonitored, unregulated adoption-related activities taking place on the Internet." Reuters found that desperate parents turn to online groups to offer unwanted adopted children to others. The U.S. government is typically unaware of the arrangements or what becomes of those children. Through a survey of 1,500 adoptive parents and adoption professionals in the United States and abroad, researchers from the institute and Tufts University found that international adoption has shifted from mostly infants to a growing number of older children who have disabilities or other kinds of emotional, physical or behavioral problems.