It is definitely an infraction - would it make sense to have these women disaffiliate from their chapters so that they can be inpartial to PNM's and guide them, listen to their concerns, etc. only to turn around and tell their chapter???
Side note: I have a PNM COMPLETELY bash my chapter to me when I was a Rho Chi... the worst part was, I knew that my chapter really liked her. She had attended pref at both and wasn't sure whether or not to list them both on her bid card. It was really hard not to tell my chapter... (She decided to suicided XYZ who didn't really like and did not receive a bid through formal or COB.)