Credit where credit is due, KevinSchutlz had a thread with Bonisnatching in the title.
I'm going to say no to the exposure XP. In short, if I allow it here, I don't have a reason for allowing it anywhere. And in a game where you can be as old as you want to be at the start of the saga, to have the scores that you desire, it doesn't make a lot of sense.
Further, it's just not going to happen that he gets to be master to all of his children at one time. Lots of possibilities as to why this doesn't happen. The Titanoi Kaltheus honked off could acquire one of the children before his Arts were opened, getting Bonisnatched is almost certain, so 2 is probably a reasonable number, after those two events, people leave Kaltheus alone because he's been picked on enough.