Lol what is the treaty going to do?
It's not like it's legally binding or anything. The moment one of you slips up, the treaty will have been useless. You're better off just forgetting the other guys and just ignoring wound yourself. Heck, download that blocker plugin and just block his posts.
If you do want a treaty so bad, see if you can get an agreement with Badspot so that when the treaty is broken, bans will be given to the person(s) who broke it. Though I doubt he wants to be tied up in all this mess.