I think we all have a rebellious ten-year old inside of us who does not like rules. Whenever that inner child encounters rules our natural tendency is to find ways to invalidate or violate the rule. We do not like rules imposed on us by other people, even when the rules make sense. Even when the rules are in our own best interest - I can remember years ago when many people resisted wearing seat belts even though riding in a car is MUCH safer with the seatbelts on. It didn't make any sense to violate the rule, but a rule begs to be broken.
Yet, we do need rules. If you as a leader are tempted to make up rules because your team or your organization is struggling with boundaries, you can set rules -- you just shouldn't do it all by yourself. Get help. Ask people what rules they need. Find out what will be enforceable and what will not, and even more importantly find out what rules are so useful and sensible and sensitive to the desires of others that they don't even need enforcement because people comply out of respect and appreciation.
Get people involved in governing themselves. Get people involved in creating whatever rules you need.
If you make ALL the rules, expect others to break them.
-- doug smith