Am I over-reacting?

I am always looking for writing prompts.  I'd like to have a large collection that I could refer to when the muse is silent.

During my search, I found this site: Writing Prompts.  The author, who is never identified, indicates the pictures are used as writing prompts for students.

Let's hope these students are college students.  Otherwise, I found it appalling that a teacher would give children a picture like prompt #241. It's of a human being wrapped up like meat you would buy at the supermarket. The label is "whole human."  The label gives the weight and a bar code. The writing prompt reads:

The door bell rings. You answer the door and find this on the front stop.  You yell inside the house. "We got another one." Tell the rest of the story.

I'm not saying that every young person seeing this would be disturbed.  In fact, 3/4 of the things that I find disturbing are common metaphors for teenagers.  (When I was that age, I probably thought it was cool to read something and get the shivers, too.) Another portion of the students might be apathetic; some wouldn't even understand it. But aren't there children out there that would be frightened or confused?

What do you think?  Someone could use this prompt to write a best selling horror book or screen play. Someone else might use it a symbolic way to make a statement about humanity.  That's not the point. Is it appropriate for teachers to throw out an image like this and leave the student to themselves to process it?

Am I over-reacting?