The problem is, if you have him take another Lawbreaker every time he uses it, why would he take the sponsored magic in the first place? That's just 4 points of dead weight and he is going to run out of refresh before long.
Depending on the campaign, I would probably not even make him take 1 lawbreaker, if it is a very dark campaign, or 1 if it is a moderate campaign and I would probably say "would you like to think of another character", if he wanted to play someone like that in a goody-two-shoes campaign.