People make candles dangerous by burning them in unsafe conditions...under a curtain, marathon burning, falling asleep, leaving the house....heard of one guy that burnt them in his semi while driving! Candles can be dangerous in the wrong type of container...gets too hot and cracks, spilling your melt pool and exposing more of the wick, thus you have a torch! Same thing with pillars if you have a major blowout and your wick "grows" as the melt pool gushes out. Also if the glass is too hot and you have a little child touch it or pick it up...first gets burned...then drops the candle, possibly breaking glass and either way you have hot wax all over them and anything in it's way....if the glass breaks and the flame gets loose, well, there goes the home and the child. Any time you add fire to anything, the danger level rises. As long as we make the candles as safely as we can, they will only be as dangerous as the people that burn them...which in itself can be pretty dangerous! Thank goodness for insurance!