Let me be plainer about this.
You asked who'd shoot down a bunch of aircraft on the chance of getting the right one? Bad question. I see ten aircraft. Nine are normal, everyday, standard craft -- helicopters, the LTA bus for executive commuters, maybe a regional commuter fixed wing.
And then there's that one which is trying to hide. It's turned off the IFF and transponder, it's masking its signal, it's stealthed, and even though ti's a balloon it's moving as fast as some helicopters.
I don't have ten targets. I have one. If you go down and I still take fire, well, I goofed. I'll pay the court fine. (or rather my company will, and "the individual who made that mistake was lost in the firefight, your honor.")