That's not a valid test, very few conclusions can be drawn from it. 
Situation analysis:
- it was posted on a webmaster's board
- it said not to open it while claiming to be spam.  No spam calls itself spam...
- it was posted to an audience of HIGHLY INTELLIGENT readers.  
THus, it *must* have been another  misconceived "test" or teaser for an entirely different topic.
And it was exactly that.  Of course.  how does 2+2 ?
The conclusion we can draw from this post is that some people still post misconceived tests.
