Um - no.

Obviously the mom should have fulfilled her end of the bargain. But what does the child learn when they are punished because of something their parent did?

Clearly, the mom should have kept up her end of the bargain if for no other reason than to keep her son from having to feeling the fall-out of her actions. That said, I think the league (and the child) would have been better served if the league had quietly fined the mother a fee to cover her time not spent behind the concessions stand; or she should have been forewarned that not serving her time this season (i.e. not being a "team player"), would prevent any of her immediate family members from registering for Little League in subsequent years. I'm concerned that the way this was handled has left the child feeling that he is at fault in some way in all of this. The only lesson he might learn is that he can not trust that his own mother will support him enough in his athletic endeavors not to humiliate him - and that is sad. In fact, while I know that Little League is a huge deal in a lot of families and I'm not discounting its importance to those people - I'm not sure it was necessary to do something so drastic over concession stand duty. Sometimes people get so caught up in their passion for something that I don't think they take the time to really gauge the importance of a reaction in the "big picture" way that it requires.