Possible have matrix rows collapsed by default in the Control Panel?
Inject this piece of JS in your CP and they will always be closed by default:

$('.matrixblock').each(function() {
    $(this).addClass('collapsed');
    Craft.MatrixInput.rememberCollapsedBlockId($(this).data('id'));
});


Here's an example plugin that will inject it in the CP: https://gist.github.com/boboldehampsink/6bb9e5296977a99c39b1