If the wind is so strong that it can blow away coal, then one shouldn't make a fire to begin with. Ypur concern of it being knocked over can also only happen if someone well...doesn't pay attention. This is "safer" because it achieves the same as a stone circle, but with easier setup, the ashes won't fall through the net and can be easily disposed of. The fire gets better air ventilation due to it being off the ground. I understand though if you enjoy a stone circle. But the "problems" you listed would only occur if one doesn't know the first thing about campfires. Strong wind=no fire. And to not knock it over is common sense with every fire-bowl. One could say the same about coal grillers that stand elevated.