Most helium sold for general use is diluted and won't kill you (they've done this intentionally). I think people are put off by nitrogen because of the equipment involved. It's easier to try to order one or two small items than it is to order a tank, get it filled, get the regulators, hose, etc and put it all together. In my opinion (and I have nearly completed the Nitrogen method), Nitrogen is more peaceful and a sure bet if you do it right...and it's not *terribly* difficult to do it right, but it's not as easy as mixing powder in water and taking a couple pills in advance. I will always prefer nitrogen method if I have the time to purchase the components, but I have a spare bottle of SN for any emergency situation (ie, SHTF in the world, whatever).