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Leave secret messages with QR codes

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Leave stenciled QR hobo codes for tech-savvy people to find.

If that sounds kind of cool, but doesn't immediately make sense to you, here's a little history. First off, hobo codes were glyphs originally used back in the pre-internet Stone Age as a way for hobos to communicate important information to each other, but not non-hobo squares like you (presumably) and me. One seemingly random symbol would mean "this underpass is a safe place to sleep" and another might mean "talk about religion here and get a free meal."

[...]

QR hobo codes don't necessarily pertain to tech information, but they're inherently tech-y by virtue of being QR codes and they still have that "this is our little secret" vibe, while being common knowledge enough that they might catch on big time.

Geeky AND cool!



link: QR_STENCILER and QR_HOBO_CODES
via: Geekosystem

**related: Make secret sidewalk art

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