I have done some due diligence on the subject of micro aggression and trigger warnings.

Lets start with micro aggression:

You and I could have some fun with this one... I read several articles regarding this theory for the most part I have been cracking up ever since. While this theory was first described in the early 1970's but it really didn't come up until a group students at UCLA declared the campus to be a hostile atmosphere. When I reviewed the content of a list of these racial slurs it reminded me of the ebonics thing in Berkeley a few years ago. Here are some links to the best comments I was able to find.....

Microaggression and Changing Moral Cultures - Commentary - The Chronicle of Higher Education

Urban Dictionary: Trigger warning

Not sure how you go into being worried about this but from my research this "movement" is not going all that well.

Take Care.