I was a largely "closeted" smoker, so I took to stealth
vaping naturally and gratefully. It's so much easier to sneak a vape than a smoke. I understand why stealth
vaping may sometimes or even always be preferred in public or in certain social situations, so here are my stealthy secrets.
When I vaped 510s I covered the LED with an opaque black plastic pen cap. Voila, the PV is instantly camouflaged as a pen. I was only caught out once, when I forgot the pen cap and was vaping in a dimly lit bar. A guy sitting across from me suddenly looked at me very strangely and pointed out that my pinkie finger was glowing red. Oops. I muttered something about a mood ring and he wisely let it go. These days I vape an eGo; apart from being a more powerful, longer lasting PV, there's no tell-tale glowing light on the tip.
That experience taught me two valuable lessons about stealth vaping, which is part sleight of hand and part sleight of breath. It helps if you think like a magician, in terms of concealment and misdirection.
1) Sleight of hand: the eGo is a bit too large to fully conceal in one hand, but it's also matte black and therefore unobtrusive. My single-hand technique (I'm right handed) is to conceal the battery diagonally across my palm, three fingers loosely curled around it (the classic magician's "palming" technique). I extend my index finger alongside the atomizer and drip-tip, and press the button with my thumb. To anyone glancing my way, it looks like I'm just pensively touching my finger to my lower lip:
The double-hand technique is basically the same except that you don't need to extend your index finger, because your left hand completely covers the atomizer and drip-tip. This method works best when you're sitting down and resting your elbows on a table, because raising both hands to your mouth looks a bit odd otherwise. It's also useful in very dark environments like cinemas and theaters, where even the small light under the eGo button can show up brightly. Again, if you do it well the effect is that you're simply resting your chin on your hands, more or less like this (except with the left hand on top, if you're like me ...)
Walking around in extremely cold weather, of course, is one of the few situations in which raising both hands to your mouth and exhaling vapor doesn't look odd at all; people assume that you're just blowing into your hands to warm them up.
2) Sleight of breath: there are several effective ways to conceal exhaled vapor, though much depends on lighting conditions and whether or not someone is looking directly at you. The most effective is to take a drag and hold your breath for about 5-10 seconds, then exhale slowly through your nose. The breath-holding technique is almost foolproof but it's not a very relaxing way to vape, so my preferred method is to take a regular stealth drag and then exhale slowly through my nose while casually reaching up as if to rub it:
... creating a funnel with my hand(s) that guides the exhaled vapor down my arm(s). Again, much of this depends on lighting conditions and whether or not you're being directly observed.
The latter point is worth bearing in mind as part of the art of concealment. Our eyes are naturally drawn to peoples' faces and to movement, so if (for example) you take a stealth drag while walking down the aisle of a supermarket, it's more likely to be noticed by anyone glancing at you (from the front) than if you took your drag while you were standing still and facing the shelves. Pretty much the same applies even if you're sitting at a table with a group of friends; if, for whatever reason, you preferred to stealth vape under those conditions, the best plan is to "establish" your hands at face level for a while (i.e., resting them on your chin as described above) and simply wait until someone sitting opposite and diagonally to you is the center of attention.
I've used these techniques successfully over the past year and a bit, stealth vaping in airports and airplanes, restaurants, bars, at parties, etc. As far as I know no-one has ever noticed, and if they did, they didn't make anything of it.