Signs, like the Mel Gibson movie.
Walking from an alternate train station on Sunday, due to my normally express train going local that day, I walked past a gated dirt hill leading down to what is probably one of the most contaminated rivers on this Earth. But anyway, I walked past it and seen this hanging behind the gate:

Whatever, normal piece of corrugated cardboard.
Later on in the afternoon of that workday, a half Jewish, half-Puerto Rican woman came in and was interested in a particular piece of furniture. She liked the wood (I forget what kind), the shiny coat that our workshop guy put on it, and it's Asian handmade look. She would basically just use the drawer in the front foyer to deposit her keys and things in when she came in the door of her home. A quick, decorative depository. However, one thing repelled her a bit. The drawer had this on the bottom of it:

I, at first, stumbled a little bit at the fact that this sat in a warehouse ran by a practicing Orthodox Jewish man. But remembering context, I explained that the drawer was made in and imported from China. Buddhists and Hindus had extensive use of this symbol as a good thing in their religion before before Fascists took it and perverted it in their campaign. In addition, the symbol was at the bottom of the drawer, and carved in above it was a huge Yin/Yang circle that should've offset the "bad energy" that had been culturally placed in the symbol you see here.
She bought it. The symbol is below mid-shin level, so she figured that no one would really notice it anyway. If they do, she'll quickly give them a more detailed explanation of its history than the one I put above.
Life: The Irony.