and the refrigerator will definately not fit in the safe! LOL! seriously, I believe you have to request a fridge and that they are those college dorm size ones.
I take my laptop everywhere ( mostly because I am on call 24/7 and always need it). I have never "locked" it up at any hotel be it in WDW or elsewhere.
Nothing has ever been taken from any hotel I've stayed at and I would be very surprised if it was. If something like that did happened it would be a disaster to lose all my info on the pc, but I've never worried about it.
What about your camera's and Video's? Can't lock everything up.
If a problem did occur, hotels employees with access to rooms are all "bonded by an Insurance Co."
Refrig. costs $10. day, take a collaspable cooler and fill it daily with free ice.