On their website, the organization explains why they put the billboards up:
One of the reasons we put the billboard up is that we are concerned when religious people feel they have not only the right, but the obligation, to force their religious views on others. Examples are proselytizing in the military, educational systems, and government. Another example is the attacks by religious people on gays, lesbians, and abortion providers.
If you agree with the sentiments of the sign and live in Colorado, there is probably a secular organization near you. You will be surprised how much we do, both as activists and in the social arena. Most of the COCORE groups have monthly meetings, book discussions, lunches, and social activities. The Atheist Alliance of America will be having their national convention in Denver in 2012.
If you disagree with the sentiments of the sign, please don't be offended. We are more interested in opening a dialogue than upsetting you. We don't ask you to stop believing in your version of a super-natural being. We do ask that you consider not forcing your religious views on others.I couldn't say it better myself! I wish there were hundreds of these billboards up around the country. What do you think?