I can sort of see the use of the first one when camping, but the rest are just messy and destructive. It is far quicker (and less messy) to grind pepper in a small electric coffee mill and the cheese grater will fall apart after you have used it this way a few times. As for the scrubbing attachment, I lost what little respect I had for the makers of this instructional video when I realised they were showing the method on a non-stick surface. Using a scrubby on non-stick is a sure-fire way to flake off the Teflon coating and ruin your pan.
How to make a mess in the kitchen