Funny you should mention this. It has happened at formal meetings before. I was floored by girls giggling, passing notes, and telling jokes. It wasn't until one of the advisors stood up & commented on it that the ladies finally got the message. I can definitely remember a time when girls would not even dream of doing this during formal meeting. Now it's like some girls aren't being taught to be respectful during meetings.
When (and if) I ever become an advisor, I will definitely put my foot down over thie type of behavior.
Another thing I would clarify is the dress code. Just b/c you're wearing a skirt does NOT mean it's appropriate attire. Girls are more interested in looking cute and trendy than being appropriately attired for meeting. I let it slide tonight with a warning but can guarantee that it will not happen again or girls will be sent home until they get the message.