Why do electronic manufacturers continue to place those “Caution: Risk of Electric Shock–Do Not Open” warning labels on the back of their products? Most people have sense enough to not remove the cover (or back) from their TV set, stereo, or DVD player. It’s common sense. There are parts that contain “dangerous voltage” inside the product. I just got an electric piano and on the back of it the warning label and symbols are there. Why do they do this?
Common sense is not all that common. When you accept the fact that 49% of the population is below average as far as intelligence is concerned, things like this become much easier to understand and accept.