Given the poll results and the thread view count, I'd say that not a few people looked at the thread and didn't recognize the symbol but didn't vote, leading to skewed poll results. 
Crap, apparently I could not link the image that way.
In the case somebody wanted to see the original picture, please check: http://www.f-16.net/f-16_forum_viewtopic-t-487.html
Still can't see the image btw, not even on that page.
Huh? It should be on the first post, black and white picture of USAF members posing with a placate containing some interesting wording.
Some excerpts:
"International good guys
World population control specialists - sea branch" (would this make them Navy pilots then?)
"Death on call 24 hours a day
We kill everything
on for 65 c - a month
Small wars won at small price. Large wars slightly higher"
Etc. and so on.
Times have changed. And yes, I did find the black and white picture funny, if somebody wondered. But I'm not sure of my reaction should that happen today.
EDIT.
Yet again the cursed prepositions!