Here in Eastern Kentucky, they were often referred to as a "fancy crack-pipe"
A few years ago, cops in the area were pulling people over left and right, when they saw someone with an eGo or similar device... thinking it was drug-related. My ex-brother-in-law is a detective in an urban area, and he said they had to go to a mandatory class offered by the State Police, which taught them how to spot Nicotine-replacement devices, to avoid unnecessary traffic stops (and possibly a law-suit). He said they were taught about Nicotine, PG, VG, flavors, different devices, how they all worked together, etc.... and the amazing thing is that over half the smokers in his department switched to vaping after the class and many more followed over the next year or so....
Sadly, about the beginning of 2016, thanks to the nannies in gov't and the health-department, they are no longer allowed to vape at the precinct, in public while in their uniform, or in their squad-cars... yet they are still allowed to SMOKE in their squad-cars, as long as it is an unmarked car, and they are still allowed to smoke in plain view of the public, while in uniform...