Pure CRAP!

This majorette crap is getting on my last nerve!!! Yesterday at band practice the majorettes got a sponsor, see this sponsor is to be with them during there games like a chaperon. Well where do I start??
Brittany is just pure mad when she gets in the car and I asked her why did she look so mad and she said "because I am" she proceeds to tell me what happened while she was crying. By the time I could calm down and close my mouth because I could not believe what had happened. I was just in pure shock.
Here it is:::: She pulls Brittany to the side and asks her about another girl in the band - If she liked her or not? Brittany said "no not really", she then tells Brittany that on her (Brittany's) myspace page- Brittany has nasty and rude comments about this girl and that Brittany has that she (Brittany)is a future porn star! Okay are you as pissed off as I am now???
This is not it- she then tells Brittany (as she has a clip board out like she is marking stuff off) tells her that there are alot of parents involved in this and tells Brittany to not talk about this girl and to leave her alone!
First- I have access to Brittany's page and I check it daily!!! This Savanna girl is not even her friend with myspace so Brittany could not send her messages anyway and the whole porn star thing! WTF??? My child would never say that about herself and who the fu&$@ does this woman think she is and where in the heck is she pulling this stuff from? The freaking sky? Brittany told her that she does not have anything posted on her page about this girl and that her page is totally "G" rated. She does not and has never posted anything bad about this girl, believe me I would know I check it every freakin day!
Fortunately this woman had allready left by the time Brittany was done telling me everything. I guess that was a good thing for her. I probably would have said some very improper things to her.
I e-mailed the band director today (after I looked this woman up in the phone book and tried to call her house last night and was unable to reach her) He said he is going to look into this and get back to me.
I just think first of all this was very improper for a grown woman that is older than me to pull a child to the side and talk to her like this. I do not know this woman from Adam, however she seems to think she knows my child so well to do this! I am so furious and have just made myself sick about this. I would love to know what you would do in my situation and how you would handle this? Because I have had no resolution YET!!!