"So, you mean they're homophobic?"
"Well, no, but-"
"So they're misogynistic? Racist? Transphobic? Ableist???"
"N-no, actually they enforce strict banning on all those things, BUT-"
"So they bully people into suicide?"
"Nooo, they require content warnings for even mentions of suicide, BUT!"
"...Yes?"
"I saw one of them say 'death to nazis!"
"So they're the opposite of 4Chan?"
"NO!"
I think it's a decent habit to practice for general triggering topics, but I think that realistically it will be impossible to protect all traumatised people all the time while still being able to discuss such events. And sometimes these discussions are important to have.