I can't 'slate' people for vaping / using e-cigarettes, people can make their own choices, but as Mark has just said, it seems weird there is no regulatory body or long-term research available, yet people are willing to use these things...
The claims cigarette manufacturers used to make are 'impressive'! I wonder if the same thing will happen 20, 30, 40, 50 years down the line?
http://listverse.com/2009/06/27/top-10-unbelievable-vintage-cigarette-posters/