The amazing upside down sign

[Duke87]

No, I don't mean a sign where the top bolt fell out and it swung down. And I don't mean a sign that looks similar both ways such that it could understandably be accidentally flipped.
I mean this:


Not just one sign, but an assembly of two signs, clearly quite deliberately hung upside down!
I suspect this was done by a couple of juvenile pranksters.

Note that street view depicts the sign in question right side up.

[Quillz]

This reminds me of a time when someone hacked one of those electronic warning boards to say "WICKED CURVE AHEAD" instead of "Construction Ahead" or w/e.