I would have signed, since I'm not an American citizen 'm not sure if I can, I don't want to ruin the petition so I'll give you my full support.
If you stand for freedom and liberty...you are an American!
oops, I meant to get badmatty in there for posting the link. The second half was for youngtory
It says "Residents of the United States and allies."
http://www.petitiononline.com/as123/petition.html
I don't think you need to be a gringo, it is an expression of support.
http://www.petitiononline.com/as123/petition.html
I am from the UK and I signed it around the 34,000 mark. I can't think of any reason why not. We are allies in a world war against islamic terrorism.