I agree with Anony Mous - the claim of being "triggered" is nowadays predominantly used by people who treat it as a convenient prop to silence views they don't agree with. Nothing todo with genuine trauma at all.
The people misusing it deserved to be triggered mercilessly until they are a wailing puddle on the floor. Hopefully, with it filmed for its comedy gold value.
Those who have suffered real actual trauma should not be unduly subjected to unnecessary reminders of it, but also owe themselves and others some personal responsibility not to expose themselves to where such reminders may appear or be too keen to see them where they are not intended.