GPhiSweetiePie, if your friend doesn't believe you and maybe doesn't believe GreekChatters. maybe she'd believe the National Panhellenic Conference. You could let her know that she could check out the NPC site
http://www.npcwomen.org
and click on "policies." One of the first things they mention under "unanimous agreements" is the policy you're talking about -- and you are absolutely right.