Actually, Virginia, I take trigger warnings with a large grain of humor. The idea that someone should be frightened or feel threatened by a reasonably presented topic is laughable. I always took your capitalism trigger warnings as tongue-in-cheek on your part.
This of course does not include trigger warnings of a deliberately incendiary sort. (Example: 'warning: Jews may not like this content', reminiscent of the old Nazi 'Juden haben keinen Zutritt', no Jews allowed.)
And yes, I think the snowflake mentality has gone much too far on college campuses, as have the re-definitions of racist, sexist, etc., to include anyone who disagrees with the opinions of the users of such epithets.