There are just so many things wrong with this light switch (hat tip to skepchick.org, original source: http://scienceblogs.com/pharyngula/2008/01/inappropriate_iconography.php):
Let me count a few of the wrong-ish things:
1. Just the fact that we are displaying a religious icon on a lightswitch in the first place.
2. The obviously inappropriate placement of the switch.
3. The unhappiness (or at least lack of happiness) of the children as they take a weird sidelong glance at the "switch."
4. The inscription on the plate that is somewhat worn, but seems to repeat the bible quote "Honor Thy Father and Thy Mother." It's just a nice indoctrinating message for prominent placement in what was presumably a child's room. Another good argument in favor of Christianity being a cult.
. . . and I'm sure there's more, but this is plenty for now.