I read your blog post (subscriber) and in my professional opinon there's no way that could cause the canister to blow up. I've spent my life, well, mostly my younger years, burning things, blowing things up, etc, (I had a creative childhood- spent many years wrenching on cars, and moved into a welding career so I spent a lot of time with molten metal).
First off- that's some really thin aluminum. I'm more than willing to bet if it would be lucky to make a burn mark if that small amount of aluminum "dripped" onto a wooden table. Aluminum has a low heat capacity, so by the time it fell those couple of inches it would cool off DRAMATICALLY. Secondly- motlen aluminum in an oxygen environment oxidizes almost immediately. So, I seriously doubt any molten aluminum would even reach the gas canister. It'd be more like flakey white aluminum oxide. And third, which kind of ties into point number one- the drops of hot aluminum (or aluminum oxide) would just bounce off the canister. Even if it had enough btu's of heat in it to get the canister hot enough to blow, it needs to transfer those btu's into the canister. That takes time. Duration of contact. There wouldn't be enough to get the job done.
I mean no offense. Like I said, I'm a subscriber of your blog. You post interesting stuff. But I personally thing alarmist messages like "OMG YOUR CANISTER IS GOING TO BLOW LIKE A CLAYMORE" don't belong in a respectable media outlet. I mean, seriously, if Backpacker Magazine published your article for a magazine do you think the Jetboil people wouldn't sue for damages?