Wisteria behaves around here in a terribly invasive fashion. It bothers me to see a tree thickly girdled, losing health, and probably heading for death.
Last summer I stepped in and severed a huge vine that was attacking a red oak. You can count the growth rings to see how long this vine was at its work. I do consider letting nature have its own way (who am I to judge the merits of one creature over another?) but the wisteria does seem like such a bully.