The best part of this whole thing is that the Original Poster gets to meet with those 6th grade kids and their parents and explain to all of them that they won't be playing in their championship game because he couldn't keep his mouth shut!!
The fault is 100% yours, dman. Now "man up" and admit that to these kids and their parents...don't you dare try to blame the loss of their championship game experience on anyone else. Had you kept your mouth shut and left the gym, those kids would be playing again.