This was a big thing on ECF back when I was active there, though I've been here exclusively for about a year...methinks it comes from the belief that higher wattage/temperature gets you closer to burning wick/liquid, and when you burn things rather than vaporize them you end up with the same carcinogenic particles as smoking. I go as high as 60 watts and I don't "burn" anything, and I also avoid the "unsavory" elements in my liquid by mixing my own. Not sure if it's 100% safe (I assume it's not), but it's eons better than smoking IMHO...
