As the other goalie said in the thread, as long as the colours are easy to tell apart, I don't care if you dress up like Ovie or Crosby or Howe or whoever. I play pick-up hockey with some older gentlemen and some of them wear NHL jersey's. There's a white Markov Habs jersey, some Blackhawk home jersey's, a white Leafs Kessel jersey and some others that may have slipped my mind. I don't mind them, I find it interesting actually to see who wears what.
Sometimes though I'd like them to play like the player on the back

Like there's this one player that plays on my team and wears a Keith Blackhawks jersey, unfortunately not the most mobile of defenders.