I would caution (PP39) Wyrms to verify that they are allowed to attack under 39 before launching an assault. There are still substantial benefits to being in the council (I believe), and mistakenly attacking another Wyrm before you are allowed to (i.e., before they attack someone else) will result in automatic roguehood.
I have an urge to make a little chart showing who has attacked who under the allowance of 39-- but that's uncessary, I'll just start a subpage on the wiki. I always wanted to use the "Treaty" page:
http://yarnspinners.improbable.org/Wyrms/index.php?title=Treaties