Designing placebos?

Design, white lies & ethics
“You’ve probably run into “Close Door” buttons that don’t really close the elevator, or sneaky progress bars that fill at an arbitrary rate—these false affordances and placebo buttons are everywhere, and might make life seem a bit easier. But is this ethical design? And can we build a framework for working with false affordances and designing with integrity?”​

And check out the interesting example in the comments about mobile phones and fake antennas.