> trigger warning

> The phrase can cause stress about what's to follow. Additionally, one can never know what may or may not trigger a particular person.

Hmm can't say I entirely disagree with them on that one. I mean it's clearly not a harmful phrase but it definitely is a useless one.

It carries almost zero information. Who is going to read "trigger warning" and think "oo they know that I'm highly sensitive about this specific unknown subject. I don't want to get triggered, I'll stop!"

Contrast it with something like "spoilers" where everyone agrees on what it means and people generally really don't want to read spoilers.

The document you linked doesn't mention "victims of gun violence". It contradicts your original claim.