entire class accused of insubordination & sexual harassment

I need an outside/unbiased viewpoint please...

Would it bother you if a high school teacher accused all students in one of his/her classes of "insubordination and sexual harassment"? What, if anything, would you do about it as a parent of one of the students in the class?

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EDITED TO ADD SOME DETAILS:

Here is what we learned from my dd...

First, some background. This is a yearbook class - so atmosphere is a bit different than a typical class. Eighteen females and two males. For the past two years (perhaps before that but this is my dd's third year) the class has been very much student run, with the Editors in Chief at the helm and the teacher taking an advisory role. This particular teacher is new this year. The kids know each other pretty well. They are all working together toward a common goal and know how to accomplish that goal.

So today the advisor asked the students to all sit down (they were up and about working on various projects) because she needed to talk to them. First thing she talked about was how she "fact checks" and knows they have been lying to her. No specific examples were given to my dd's recollection.

Then she tells them they are not too young to be charged with sexual harassment. Specific examples given were inappropriate touching, sitting on eachother's laps, hanging on eachother, and hugging.

Advisors last major point was about insubordination. She told them she is their superior. She is not the tail of the dog - that the students are not wagging her. She is the dog and the students are the tail. ? ?  DD does not remember her giving any specific examples of insubordination.

My DD says she has never witnessed inappropriate touching or students sitting in eachother's laps. She has personally done neither of these things. She says hugging is a common behavior and that she has personally hugged classmates on several occasions - sometimes just as a greeting, sometimes if someone is upset about something. She says she has never lied to this advisor and does not feel she has ever been insubordinate.

We talked a lot about sexual harassment and told dd that we agree with the teacher that some of those behaviors could indeed be considered sexual harassment.

DH feels like advisor has seen some issues that may begin to be a problem and was trying to educate the class. We talked about this too. DD did not completely discount this as a possibility but said it felt very much like an accusation - to her personally and to some of the others in the class. She said the feeling in the room was shock and discomfort. DD also maintains that this was out of the blue - that advisor has not previously given any warnings about these types of behaviors.

To DD's knowledge, the advisor has not officially written anyone up for any of this. She told the class that she could and would.

I'm not sure if this is an over reaction by my dd or by the advisor - or perhaps both? I'm feeling like my next step needs to be to ask this teacher for specific examples of lying, insubordination, or sexual harassment that involve our dd.

Sidenote: dd was recently recommended to compete for a very prestigious honors program in our state. Guess who the recommending teacher was?