You're far, far more likely to get robbed leaving the window open than for gas to leak (those who live on the ground floor, like us).

Then again, not all cookers run on gas. Ours runs on electric. Still, my previous point stands.

Hell, my dad leaves a light on when nobody is in to give the illusion somebody is in the house.

Electrical appliance disasters get reported on the news because it's a rare occurence. Bootlegs, poor wiring and undertested new products are the sole cause. If an electrical appliance has been safe for years, chances are it'll stay that way.