Atheism Strong and Thriving in New York

The New York subway system is the busiest in the world. With over a billion people using the subway system in 2008, subway stations provide an ideal place for advertisements. And that is exactly what eight Atheist organizations want to do: advertise. They will post posters in 12 of the busiest subway stations, all of them with the same message: A million New Yorkers are good without God. Are you?.
It has already been stated by a representative that the posters are not there to belittle religion or to offend religious people. They are merely there to provide an option for people who feel the same way as established atheists. The entire article can be Read Here.
Personally, I believe these people have the right to post their messages on public domain. American Society is constantly exposed to messages of Love and Acceptance of Jesus from Christianity. There are crosses and images of Jesus throughout New York and other large cities such as Los Angeles. So who is to say that nonbelievers can't post their own message?