The upward trend and popularity of vaporizing devices such as vape pens, have caught the eye of federal, state and local governments. Currently these products do not fall under the same advertising restrictions that tobacco products do.
The FDA and CDC have their sights set on imposing new regulations for vaporizing devices, they have proposed putting them in the same classification as tobacco products so they will be regulated in a similar fashion. The CDC has already expanded their anti-smoking campaign to include e-cigarettes.
While governing agencies try to categorize vaping and traditional smoking together, there is a lack of data that supports this. Proponents of vaping claim that it actually helps tobacco users stop smoking.
Sources:
http://www.fda.gov/
http://www.paintthemoon.org/pax-2-vaporizer-review/
http://www.cdc.gov/