I know you're being silly, but the palming violation should be called just like a slight bump. Sometimes that bump is incidental, sometimes that same amount of contact is a foul -- depending on how it affects the bumped player.
Sometimes the palming is a violation, sometimes that same palming is incidental -- depending on how it affects the defender.
If you're smart enough to judge incidental contact, then you're smart enough to judge whether A1 gains an advantage by palming the ball. I won't venture a guess as to whether you're smart enough to judge incidental contact.
