This will only work on small hits
This is the method I've been using to stealth vape, as well. I can do it with a normal drag - they don't have to be small drags.
My state recently enacted a statewide indoor smoking ban and my work included e-cigs in the ban, even though it's not included in the state law. (Yes, the company bigwigs are getting a letter from CASAA!) But by stealth
vaping, I can sit right in the breakroom and vape. no one has said a thing, ubt my H16 doesn't look like a cigarette, either.
I also used this at one bar last night. It was the first time we went out since the ban became official and he didn't want me to "make a scene" by vaping.

As the night continued, we went to a few other places with friends and just started vaping openly. It was a great time and no one gave us a problem!