Why does even the conservative world have to cater to least common denominator (i.e., stupid people)? The signs look perfectly appropriate alongside some others in these pics, like the 'chicken footprint' one that has a peace symbol much larger than the text.
The signs aren't meant for conservatives. They're designed a certain way so at first glance they look leftists--this is what allows the Warriors to infiltrate the enemy camp.
Using it in Freeper camps is just wasting ammunition.