For what it's worth, I think they were exactly what MBF has said - kids who were able to get to their Christmas gifts early. The Maloofs weren't absentee owners for the Monarchs. I'll never forget the image of Kara Lawson jumping up and hugging Joe. I don't know who was more excited...
At the worst, I think they're just guilty of poor timing. They wore the rings because they're PROUD of the Monarchs winning a championship. I don't really think there's any hidden message or anything. (BTW, wasn't it just Joe? I don't recall seeing it on Gavin's hands as he stood with armed folded in the tunnel...)