Sounds more like a USA problem than a USPS problem, this being an outlier of religious beliefs among wealthy nations. Atheist Shoes needed to send packages via FedEx and UPS in the same way to actually test this, and apparently didn't.
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Surely we can save everyone the time and trouble and just assume that for nearly every business:
Study Shows ________ Execs Slightly Prefer Romney Over Obama
I think the meaning of "geek" is in flux.
You could argue that at one point "geek" was just a term for "non-academic intellectual." Now it seems that "geek" is a much looser term, requiring only a fondness for technology.
As an geek in the high old fashion, it's a bit sad to see the word lose its meaning, but "real" geeks are still out there.