In many case killing a rat gave too much heat on a family. The Gravano case with miciotta and another seno to kill him is only because gotti sr was alive.
Vincent Palermo live in texas and was make photo of him.
Leonetti is different nicky sr until will be alive will try to kill his nephew and more the Narducci and the others that made more time thanks to phill will never forget.
At the end depend by the rat rank.

Massino for sure will stay hidden until death,because was a simbol the only boss of the 5 Fams that ratted while an associate or a made man is enough that stay out of where her borgata make bussiness.