I know there is the option to mark a thread as containing triggers but this is in reference to triggers in posts.

While posters are very good about marking any possible triggers the warning sometimes it's not enough especially for those who tend to skim a post and notice the warning too late or something.

I was thinking maybe a process like on IMDB where the spoiler is blacked out unless you hover your mouse over it or a font colour the same as the usual site background colour so that you have to actually highlight the words to see them. would add a little more protection.