I just hope more wingers/fullbacks start using this geniused technique, just so it's put an end to. And don't pull out that ridiculous "Oh but it's his natural action" nonsense. If your "natural action" involves kicking challengers in the head, be they early, late or on time to the challenge, you don't do it. It's not rocket science.
And I've seen Billy field PLENTY of bombs without raising his leg to right angles off the ground directly towards an opposition challenger, so please, for the sake of sanity, don't pretend he's done it this way since he first leapt out of the cradle.
I unconditionally guarantee you that if this utterly absurd action is emulated by even a token few others, it'll be banned, and, in my opinion, rightfully so.
Incidental, accidental, whatever you want to call it, sure. At the end of the day, it ends up with a boot to the neck/head, and discourages challengers to the ball.