It's just like the USSR in the old days where police and kgb would
harass you (actually, me

under the pretext of national security
and taking a photograph in the wrong place would be a very
commonplace reason for arrest. I'm sure it's the same in many if
not most countries - and sounds like the USA has joined them.
This subject has been discussed before but I saw a series of
programs on the English BBC about the "neocons". Cannot remember
the names - but a certain academic set up a very influential group
of advisers in the 70's in Washington, basically saying - all these
hippies and liberals - they don't pay taxes, they only care about
drugs and orgies - individualism and pursuit of pleasure will lead
this country to ruin. So the answer, he said, is to actively
exaggerate any foreign threat - basically, if an army of subhuman
monsters is about to invade and tear your nearest and dearest limb
from limb - then you'll be too busy sealing windows with duct tape
to worry about any "necessary sacrifices" in the name of security.
Anyway, if photos of important facilities were so helpful to
terrosrists, then why isn't anybody getting onto google for
displaying important places like -
http://maps.google.com/maps?ll=33.942261,-118.403318&spn=0.009667,0.013669&t=k&hl=en ?
Don't read if this bores or bothers you - but the BBC series I saw
- well, in the 80's this think-tank managed to "twist the ear" of
US president "Ray-Gun"

- kept telling him how the Russians were
about to start "the Big One". So he ordered a commission to look
into this "threat" and they came back saying - "We found no proof
of any aggressive Russian intentions." His "team of advisors"
responded - "Well, that shows us how carefully these devious
Russians must have hidden their true plans - we must prepare for
the worst without delay!" And they started spending even more money
on building stuff like this:
http://maps.google.com/maps?ll=32.150899,-110.834026&spn=0.009034,0.015192&t=k&hl=en
now that is a worrying sight, don't you think?