It would be a shame if the lesson learned is simply to remove the controversial bits from your course.
The issues of freedom of speech and transgender rights, highlighted by recent events involving a teaching assistant at Wilfrid Laurier University, remind me of my first year as a university instructor in the late 1990s, when I taught a communications course on advertising at York University. (Yes, I understand that the status of a TA is different than that of an instructor, but I think for the purposes of this anecdote, the principles are similar.)
While teaching the course, I saw an ad for Sauza tequila in the campus newspaper. It featured a photo of an attractive, swimsuit-wearing woman, with the phrase, “She’s a He,” written across her chest. The ad’s tag line read: “Life is Harsh, Your Tequila Shouldn’t Be.” (The ad didn’t identify the model, who in fact was Caroline Cossey, a transgender model.)