I am going to sound like an asshole for saying this, but part of Privilege is assuming because an exception of a rule exists it should exist for you, and if it does not exist for you it needs to be changed to exist for you or eliminated.
The idea of trigger warnings and such is for the narrow tailored subject of people having PTSD. Which does exist, and stuff involving the environment can cause a rapid relapse of real life problems due to an "icon" / "artifact" trigger like a detailed reading of something in a class.
Now whether the trigger warnings actually help or harm PTSD is another conversation. Furthermore how you implement trigger warnings for PTSD is something that should be studied and we do not know how to do so in a systematic manner, it is people just making up things and trying to be prudent / conservative / cautious.
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But that is not what trigger warnings is really about anymore. It may have been this way in the original discussion / concept but in the last 3 years the issue has taken a life of its own. Literally in pop culture but also college student bodies passing resolutions these issues come from 2014 and 2015 it is like they came from nowhere and now there is a culture war.
I bring this back to the concept of Privilege for most people prior to 2014 have never heard of the concepts of Safe Space or Trigger Warnings, but once certain newspapers and websites posted articles about campus student bodies doing X then everyone had an opinion on it. Yet if you are familiar with anxiety disorders, suicide, PTSD, gay and lesbian, etc you would be generally familiar with those concepts prior to 2014 but even thoughts people would have nuance and it is hard to label specific definitions to those words for they represented abstract concepts. But once enough of a tipping point happened that it broke through the ether than everyone has an opinion on these words of safe space, trigger warning, etc.