I agree...don't put anything on them (or at least not on the top shelf or two until they are anchored. If you are stacking them, I would not put anything on the one being stacked until it is anchored. I also agree that it should be about a 5 minute job with an electric drill, wood screws, and a stud finder. They make stud finders now that can sense electric current, so hitting wires isn't a big risk either.