I've done some flight sims which are apparently 'realistic', and it is quite tricky to launch pretty much anything short of the heat-seeking sidewinders.
I'd imagine a multi-vehicle system is going to even more complicated.
Even heat seeking sidewinders need a target selecting first before locking on and firing. It's all pretty tricky unless you've had experience or know what you're doing. I would imagine a surface to air missile system to be similar, in that you would have some sort of screen showing blips as potential targets. Which would first need selecting before the system would even launch. Unless it was a totally automated system set to fire at will, which would be crazy.