Shouldn't you be covering up your electrical outlets if you have small children anyway, and not counting on security through obscurity? Small children have a knack for sticking forks or other hazardous objects in electrical outlets whether or not they've seen someone else do it.
(Come to think of it, college is when you really have to worry about your kids frying themselves because they saw something cool on the Internet. At that point, you've let your guard down and assume you don't need to babyproof. But I distinctly remember being sad that I'd missed the exploding wires demonstration in physics class and deciding to replicate it myself with a frayed Ethernet cable in my dorm room...that could've gone very badly. And my friend electrocuted himself trying to get pirated satellite with a board he'd bought off the Internet and a dish we self-installed on the dorm roof.)
(Come to think of it, college is when you really have to worry about your kids frying themselves because they saw something cool on the Internet. At that point, you've let your guard down and assume you don't need to babyproof. But I distinctly remember being sad that I'd missed the exploding wires demonstration in physics class and deciding to replicate it myself with a frayed Ethernet cable in my dorm room...that could've gone very badly. And my friend electrocuted himself trying to get pirated satellite with a board he'd bought off the Internet and a dish we self-installed on the dorm roof.)