Signs signs...everywhere there's signs

Some signs are average, some are worth talking about, most could be better.

Dan Pink teaches us the value of emotionally intelligent signage.  By demonstrating or encouraging empathy, the user is more likely to comply.  He gives us some stellar examples, including:

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The insight is sound.  But why stop at signage?  Wouldn't this principle apply to other mediums?  Websites, advertising, graphic design?  What do you think?

Too often we have a good idea and limit its potential to the original arena.