Oh no doubt. I absolutely believe it is already happening. There's almost no way to police it unless you inspected guys helmets, patted them down, and inspected every inch of the driver seat area before a race. Even then, there would be ways.
Still though, I'm for the ban of sticks as they really are a distraction. It gets a bit ridiculous seeing 24 different pairs of sticks along the wall of the track during the A main. The release even clearly states that hand signals will be allowed.