We never childproofed our house. We just watched our child. If he ever showed an uncomfortable (for us) amount of interest in something dangerous/breakable, we would tell him to leave it alone, and he pretty much would. Our reasoning is that we could lock everything down in our house, then anytime he was ever someplace where things weren't childproofed, he'd be all over everything. This way, he learned not to play with lamps, electrical cords, etc.
Of course, this requires parenting, something many parents aren't altogether willing to do.