Priscilia, I understand what's your stand in this matter. As I've mentioned, just because everyone is doing it, doesn't mean that it's right or that we should do it. There's nothing controversial about it, it's stated quite clearly in our statutes, the uses and limitations of copyright. If someone is caught, ignorance won't be an accepted excuse at all. Of course, there are some exceptions as you might have concluded. In the case of the lecturers, it can be considered as part of fair use for education. But some people really don't know about these things, so there's no helping it I guess. But if you are aware that it's illegal, and you make no effort to change the way you use copyrights, then that's just questionable behaviour.
Anyway, back to the topic, honestly, I have no idea why would they want models to look at that. Is it just so that it will be something of a shock effect? Or some designers actually think that they will make the clothes look good? If they actually design clothes to fit these models, how are they going to sell the clothes when most people can't fit into them?