Kansas has banned sales of e-cigarettes to minors . . . and, God bless them, that's all they did. They didn't try to restrict sales to adults or otherwise bring anything in through the back door.
Kansas appears to be pretty forward thinking. Earlier this year, a nonbinding resolution was proposed (House Resolution 6026) asking the Kansas Department of Health and Environment to conduct a study regarding tobacco harm reduction:
The Committee on Federal and State Affairs recommended on May 4th, 2012 that the resolution be adopted. (Not surprisingly, the American Cancer Society opposes the resolution. )