Last time I checked, anyone who is 'spraying' is probably missing a lot anyway. I for one am very happy to meet a 'sprayer', as their aim is generally horrible. I'll admit I tend to panic and spray myself, but that's because I'm just terrible. And yes, I'll be missing. If I hit anything other than a wall during those moments, my enemy can consider himself extremely unlucky, but definitely not outplayed.
I am loving the term by the way and will make sure to introduce it if we play some BF3 again.
Edit: I'm thinking but wouldn't that just mean, with a pay feature like this, that you'd just empty your gun on the nearest wall with a silence device (been ages since I played!)? As I understood it, "just" running out of ammo wouldn't cost you.