No, triggers are really strangely specific and unique to the person: The cologne your rapist wore, or that tune that was playing on the radio when your supposedly-secure position was attacked... The topic in general is safe, at least when it comes to triggers.
I wasn't talking about someone warning for just mentioning words or topics in general. We both agreed that was dumb. I explained that I felt it was less dumb to warn for more intense things like gunshot sounds or graphic depictions (eg art, sound, video) of a traumatic situation, because these are things that are common triggers and more intense than the abstract concept itself.
I accept and understand that
most triggers are unique to random little details of a person's trauma, but #notalldetails are unique to a single person's trauma, eg there are many US vets triggered by fireworks on 4th July because they sound like guns; and things like the graphic depiction of someone being raped can include specific sounds, words or positions that are potential triggers. Or even if it contains no specific triggers, because art and media is designed to be emotionally engaging, the depiction as a whole can trigger an emotional response to the media in a rape survivor, that echoes the emotional experience they had during the event, and since the body remembers how it all happened last time, those same neural pathways are lit up, and suddenly you're locked in the middle of a full-on flashback.
One cannot warn for every random thing, like the colour of a jumper or a random song, but there are things that a large enough amount of people have triggers for that it is appropriate to warn for them, especially if they can't afford therapy in order to do the controlled exposure method, or have just had a very intense therapy session, or have already had a big panic attack that day.
Once warned, if it is a trigger for you, you can always choose to ready yourself and then expose yourself to the media anyway. But giving people the option and a bit of warning is kinder.