All types of fuel are inherently dangerous. Following procedures for good quality installation, maintenance and day to day usage will reduce nearly all risks to a negligible level.
If things go wrong, different fuels have different consequences. Gases can accumulate and can explode quite easily. Mishandling of alcohol can cause fire but it's not as volatile as gas.
If you run out of alcohol fuel in the middle of cooking breakfast, there's a temptation to try to refill the alcohol whilst things are still hot. This is extremely dangerous. In fact it is suicidal.
Anyway, I still like my Origo
When I was camping once, I had a small gas cooker burning in the open air on the ground with a pot on top. A few feet away, I started to install another canister into another cooker. As soon as the seal on the canister was broken a minute jet of gas must have shot across to the flame on the other cooker because it ignited directly from the canister in my hand. Needless to say, the canister was dropped then kicked straight into the river. Makes you think.
Mike

