As a high school teacher in Louisiana, I will give you my thoughts on this.
If I am required to put the 10 commandments on the wall, so be it. That poster will go right beside the others; Constitution, BOR's, Magna Carta, George Washington, Benjamin Franklin, and more. Will the students care? Probably not. Will they even ask about it? Probably not.
I left the posters on the wall for a test on the BOR's and only 2 out 173 students bothered to even look at it to make sure they got the right answers They don't pay attention to anything. They won't pay attention to a new poster.
The only ones that care about this either way will most likely be the adults in and outside of the schools.