I wouldn’t sign something like that. It turns Christianity into a political program - too many people run around thinking the Faith is just about having some traditional sexual ethics as is.
I signed it. I cannot say that I am a christian. I have struggled with organized religion in my life. I am a believer in Jesus Christ, I believe that marriage is for a man and a woman only, I am pro life, and I believe in the right of Christians to be Christians and to not have Christianity mocked and shunned, especially by those who at the same time have the audacity to promote Islam, the cult of death, evil, ans satan.
I wish you much success with this endeavor. Thanks for posting.