This guild been going now for over 1 year and up to now we had great community just two basic rules.
1) Pk/Harass others only when Ethically mandated, therefore have a good reason for annoying some one.
2) Guild Respect: Don't annoy your fellow guildie and above all don't scammed them. (No buying cheap in guild and selling high in market).
Not following rule #2 may give u automatic guild kick if you don't have great excuse. #1 rule is less troublesome cuz we have great community, but remember that we where all noobs at one point and some of us are still noobs we just don't know it yet.