What I don't get about this is why trigger warnings and safe spaces always seem to get lumped together in discussions like this. It's really hard to actually create a safe space. You have to actively intervene to prevent (or provide redress for) the "wrong" kinds of speech. I can totally see why a university would not think safe spaces were worth it, or even consistent with their goals. But trigger warnings are a rea…
FWIW, I don't think this is a consideration worth extending to veterans, and I am dismayed by the fact that many vets have embraced the culture of competitive victimhood that has infected much of American popular discourse.
With that said I do think that a professor giving a heads-up to students that they're going to discuss uncomfortable topics (e.g., rape) in class is probably the right thing to do, within reason (e.g., if it's going to be the central theme of that day's discussion).