The thing is, people with triggers need special accommodation in the form of warnings - but we're not generally a particularly uninformed group, you know? I've yet to run into a person who thinks warnings are infallible. Personally, I understand that any warnings system isn't perfect, and a newly instituted one is risky to engage with, as a person with triggers. But the fact that it may not be perfect does not, I think, preclude attempting to institute it to begin with.