Billy, are you active military? Or just a religious Zealot?
Who the fuck cares if they used the towers as a background. They are gone.. YEARS ago gone..
Why not let water under the bridge lay where jesus flung it...

They want to advertise that they are stupid for using the towers as a backdrop for they're message. Let them!. It only shows they're stupidity in choice..
Personally, i think the poster is stupid for that reason alone. They should have chose something else for the background. Maybe like the international space station.. That might have had a more positive effect.
As far as being able to put that up. Hey, freedom of speech and all that..