Sounds a little like something Douglas Adams wrote about in one of his Hitchiker books. He called it a 'Someone Else's Problem Field' and it basicly made people ignore something, someone, or an event that was happening right before their eyes.

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All the Woes of a World by Jonathan Icknield aka The Bryster

And in my final hours - I would cling rather to the tattooed hand of kindness - than the unblemished hand of hate...