"DO NOT POST PICTURES OF THIS SIGN ON THE INTERNET"
- When converted to ASCII or Unicode, the results are gibberish, AND
- It's exactly 128 bits long, the same size as an MD5 Checksum.
I'm somewhat unfamiliar with cryptography still, so please correct me if any of the terminology is wrong.
Going along that line of thinking, you can convert almost any string of text into an MD5 checksum just using some simple tools available on the internet. There is even a giant hash table of MD5 strings that you can check the hashes against.
So, In short:
986f64b93005e03efc42a41ebd573179 = http://pbwiki.com/content/jobs
That URL does indeed hash to the MD5.
PbWiki is located not far from San Fransisco, in San Mateo, CA, so it's not that unreasonable to conclude that the sign actually is a job advertisement. =P
Or, I'm way off and this could be anything.