I've a tendency when I write fic, which admittedly seems a long time ago now, not to give anything much away in the preamble at all. I sort of think ... well, novels don't, and plays don't, and films only do to an extent. I'm sure if I wrote anything I suspected would be commonly triggery I'd warn for that 'cause certainly I don't want to upset people when there are easy ways not to, but yes. I don't know what might or might not be triggery, and my preference is to go 'Here's a story with these people in' and that's about it.