I don't gamble outside of a few small wagers during March Madness. Having said that, I have a viscerally negative reaction to your proposal. It feels paternalistic to the point of near Puritanism. I don't want a laissez-faire free-for-all out there, I'm not saying "everything is fine as-is", but a government capped limit on how you waste your own money when the terms and odds are clearly communicated (unlike traditional scams, for instance)? I'll pass on that, and I'm confident I'm more of a "big government" proponent than most commenters in this community.

At a minimum I do think the government should limit advertising and crack down on incentives these sites gives to keep people hooked.