It's a nice idea, but I think I could give you half a dozen reasons it wouldn't help (and might do the opposite). It'd be just as practical as if Smirnoff used a thinner neck in their vodka bottles, so that alcoholics can't pour as much as quickly.

But gambling addiction is a serious problem, although I'm not sure the solution. I toyed with the idea of creating a "charity casino" where people could play zero-edge games against a "donor" bankroll (where they have 0EV). That way people could get their fix of gambling without having to pay in expected value. (Basically the gambling equiv. of a "safe injection site" ) but I worry that it might end up just make people rationalize gambling that otherwise wouldn't have.

So the only thing I can see that I think is strictly beneficial is trying to make sure that casinos are consumer-friendly casinos as possible (i.e. fair, transparent, no manipulative/lockin bullshit like roll-over reqs etc.)