Why don't we do this in hockey?

You know, after watching the World Cup and seeing how opposing players trade jerseys at the end of their games and watching the ESPN Jozy Altidore jersey exchange commercial, why don't we do that in hockey? I mean, it'd be cool to do and it'd be a great way to get jerseys as well. Yeah yeah, I know that hockey jerseys generally are more expensive to produce/buy, but it'd be a neat thing to do. I'd do it, just throwing that out there.