Lists "can help some people stay away, but for most people merely signing a self-exclusion list won't control that urge, " said Keith Whyte, executive director of the National Council on Problem Gambling.

WSJ: States Rethink Gambling Limits

"I think for the vast majority of kids it can be very good education and these are great skills to teach but it comes at a cost, " said Keith Whyte, the executive director of the National Council on Problem Gambling.

WSJ: School Club's Success Cheers Poker's 'Mind Sport' Champions