I will give you an in game scenario because this is whats happened on many many occasions, I am interested in your response and I will engage in healthy conversation. But in answering why the other 3 should not be marked criminals you need to consider the following things in the discussion:

- intent
- frequency
- proximity

1. Criminal enters Galadon (Often not going beyond limit of outer gates)
2. Tribunal chases
3. Criminal leaves town
4. Tribunal checks outside gate
4a. Criminal one step from gate
4b. Any mixture of other classes also there (Invoker, Warrior, Bard, Healer, Ranger)
4c. Worst scenario of this was a group of 4 in quicksand
5. Tribunal wisely waits
6. Criminal comes back in BUT only when tribunal leaves the outer gate
7. Rinse and repeat steps 1-6 several times
8. Tribunal eventually chases outside town dying to a 4 man gank down

Now I will admit I am starting here because my logging of things is horrible and I was going to put together a word for word reply from the various IC sources but I don't have half of them. So instead I am going to do a half baked one simply using help files!