Get with the program here. There are no "rules" that say you can't put stiffer bindings on a softer board, it all comes down to personal preferences. If someone wants to rock Diodes or Chargers on an Artifact or Horrorscope, more power to them. That's not what I would personally ride, but who is to say that set up doesn't work for someone else?
Found an interesting eBay find relavent to our discussion...
Burton Feelgood Est Women's Snowboard 140cm w Burton C60 Est Bindings Snow NR | eBay
It's a Womens Burton Feelgood 140cm with C60 bindings on it. That's a board designed for a 105 pound girl, with bindings designed for a 170 pound man. It obviously "worked" for her but you can't tell me that it was anywhere close to ideal.
It's like putting race tires on a pinto. Sure you CAN do it, but you've past the point of diminishing gains long ago.
It DOES make sense to try to match your gear.