It's not elitist, it's just you get to a certain number of pages of proper mockups, then someone always comes in with the MS paint jobby, it was funny the first few times, but now it's really tired.
In all honesty, I've never seen an MSPaint mockup of a product in the entire time I've been here prior to this.
It's fake because it's not in an elevator. That's all I know.