First of all why would you take Cortez, Coronado, Baffin to reach Roussillon and Tau 29 when you can go through Newcastle.
Second why would you think that being in the same group when doing so would results in a sanction. Chat list is an ooRP tool. Just like you cannot sit in Penny on a police char and go in local: Hey there is an outcast in California who wants to help me go get him. .../ just because you saw there is one on the chat list/ the same applies to groups.
And third , you really think that because Exiles can escort, their zone of influence should be extended to another 2 or 3 systems? Why on earth would the exiles have any influence in Cortez for example? Just because it makes it easier for them to escort a trader? They have Bretonia, Taus and Kyushu in their ZOI, which makes sense and is also enough.