It's not aquadag. The high voltage leads act as a form of electrostatic air cleaner. Potentially (no pun intended) fireplaces etc. can also cause noticable indoor air pollution and some of the same effects, but usually there are other indicators of heavy smokers when I have seen them. It's impressive -- scary even -- how much dust can get stuck together and the patterns it forms. There's other tests of course, such as exhaling cig smoke through a tissue, and just the effects on smoker's walls. Common sense and these simple indicators might even lead one to believe smoking is even more dangerous than the record suggests.
Back to the article, I think it plays up to the anti-smokers, which has its purposes even if ultimately wrong. I think familiarity with vaping will help reduce the fears of the public, so it's still a positive thing. It's not ideal nor do we here need to read it, but it's not really for us.