Recently, at special locations, Warner Brothers gave out a fake newspaper called The Gotham Times ( See large photo up above that is also a Desktop Wallpaper ). It looks like a real-life newspaper! It's even printed on the same kind of paper. In it there are fake ads for businesses you might see in a real newspaper. Well some of these fake companies have been popping up all over the internet. One of them is for the Gotham Police Department. Here's a picture of their website's header with the "Official GCPD Seal"...it looks VERY real!
They even made a page for the Railway Transit System with a map & everything. The funny thing is they show the line to Wayne Towers being under-construction because, if you remember, in Batman Begins that section near the building was destroyed, ha ha!!
Here's a few links for some of the fake websites:
http://www.gpdiad.com/
http://www.gvafoundation.org/
http://www.wearetheanswer.org/
http://www.gothamcityrail.com/map.htm