Indeed, there are general guidelines for the Free Republic forum which you can find here.
The science threads involving Evolution v Creation/Intelligent Design have always been rather lively on the forum but in the past few months became so toxic with flame wars that several threads were deleted and others were relegated to the Smokey Backroom. The abuse button was being hit frequently. A tremendous amount of research was lost on the deleted threads and people were quite "on edge."
To make a long story short, the flame warring parties agreed to agree on some special rules for the willing parties on these threads to try to make and keep the peace.
We are in the second week of this agreement and it comes up for review at 30 days. Hopefully, there will be such peace that nobody will see the need for it and thus, it will become obsolete.
But until that day comes, we who are willing (it is a completely voluntary agreement) "shall treat others on these threads as we wish to be treated ourselves" in accordance with the guidelines. Agreement of the Willing