[UncleMeat]

The purpose is not to help people overcome traumatic events. The purpose is to be kind to people. "Hey you are going to have a shitty day but it'll help you deal with your trauma" is not something that a professor should be unilaterally deciding.

[cthalupa]

Facilitating negative behaviors that prevent/increase the difficulty of overcoming trauma is not being kind to someone.

[UncleMeat]

But is there evidence that trigger warnings in classrooms make overcoming trauma more difficult? The cited research just says it doesn't help people overcome trauma.

[cthalupa]

Avoidant behavior is defined as specifically attempted to avoid being exposed to things that remind you of your trauma.

Avoidant behavior is basically universally agreed to be a maladaptive behavior to ptsd.