If you watch the never get busted videos from barry cooper, he says that high electric use can be noticed by company workers, and it is not uncommon for law enforcement to pay them to watch for and report the information. I personally don't see what they could do with this information, since it wasn't obtained through legal procedure, but the DEA is far from fair and if there is a system which can provide them with detailed use that would reveal a 12/12 pattern, you can bet they are looking to take advantage of it. Because of history and logistics, I tend to agree that electric use is most often an unrealistic fear, a fear which may distract you from other important risk areas, but there is precedence for keeping it under control, and no justification for calling someone an idiot.
Now to downgrade a setup to CFL simply because of the electric use being noticed does seem to be a poor, unrealistic choice. Especially if you are inconsistent and take risks in other areas, like bragging or odor. You will essentially use the same amount of nutes, equipment, and time while getting a fraction of the yield which makes taking any risk for your garden that much less justified. You are giving up much produce for the sake of reducing your risk by a negligible amount. If it is the smart grid that worries someone, it doesn't matter if the lights are cfl or hid, the 12/12 pattern can be seen. What saves you is the fact that while a 12/12 pattern may strongly suggest growing, it does not suggest cannabis anymore that it does strawberries, but this is predicated on having a fair system. More so what saves you is law enforcement incompetence, general disinterest from the electric company, and the fact that electric use is weak evidence at best. It simply isn't feasible to investigate every home that has high electric use, as cannabis is only one, uncommon, reason for such use. It is not the only thing they look for, it is not the first thing they look for, many times, it is not even looked at.
So in short, is someone an idiot for considering their electric use, nope. Is the decision to use CFL, for the sole idea that the dea is less likely to notice, a decision based in reality, nope. The problem with paranoia isn't that it makes you constantly consider risks, it's that it tends to spread you thin and leave you unfocused.