I think if you are a good aligned tribe and you go to visit another good aligned tribe you should be safe in their safezone. As long as the leader of that tribe has marked you as a friend. what do you think?
I believe in preliminary safe zones. But even I have to disagree here.
We need the element of danger when leaving your tribal area. Its pretty much the only content we have atm lol.
Besides, if you are in a friendly tribe's area, most Pkers will not be able to tell if you are from another tribe or not anyway...