A bill the Senate passed in November would clarify the law. But enforcement is difficult. A more serious challenge comes from credit card issuers and banks, which are considering bans on gambling charges because of recent lawsuits from bettors who say they do not have to pay debts incurred from illegal activities. But other forms of payment exist, including wire transfers. Some experts on compulsive gambling say Internet wagering could contribute to the problem.
Web sites permit gambling any time, even if the nearest casino is hundreds of miles away.
Gamblers can also play from home without worrying about being seen by disapproving neighbors and friends.