"Okay, I'll tell you why your exampe is silly. If we saw the expression "E=MC^2" written on the sand we would recognize it as an expression written it the language common to about 50% of humanity and would know instantly that it was put there by an intelligent force. If, instead we saw the image of a line stretching into the distance resembling this pattern,~~~~~~~ on the sand you might think it was put there by an intelligent force and I might conclude it was simply the actions of waves."
Nice try, but not quite. Replace the message "E = MC^2" with a complicated figure of any kind, and we would still "know instantly that it was put there by an intelligent force." And no, "~~~~~~~~" is *not* a complicated figure. Your claim that the message is "written in a common language" is completely incidental to the main point. Sorry, but my argument stands, despite your fervent wishes to the contrary.
Sorry Russ, but you've failed again. Are you aware that the muslims in Europe have successfully gotten Burger King to pull promotional displays for their smoothee drinks because the picture of the smoothee show a whipped topping that resembles the arabic word for their pig-dog idol, allah? It seems some of your philosiophical allies found what they believed to be an intelligent script for their god in a random display of creamy topping. How is your example any different?