They can still TAKE them w/o your GIVING them to 'em. 5 or 6 blue hats show up at your door with a list, I doubt they are going to ask more than once before you are having an intimate conversation with the ground and they are ripping your house apart trying to fill their shopping list.
The million dollar question is "HOW are we going to start the tide flowing?"
The more 4473 purchases you have, the higher up on the visitation list you are going to be. That and financial history (purchases) for parts and supplies.