Based on what I see daily on social media anyway.
I'm in a large FB parenting group where in the last month I've seen trigger warnings for the following things...
A post about being overweight
A post about using cry it out
A post about a fairly minor dispute with a family member
A post about a snake (the snake didn't do anything, it just existed and didn't yet have a name)
A post about how to encourage a back to back baby to turn into a better position
A post about a horse (the horse didn't do anything either, it was just a post about the horse)
A post about what contraception to use
And a post about a piece of plastic found in a bath bomb (no injury caused to anyone, it was spotted before use) was removed and the poster was only allowed to repost if they used a trigger warning at the top of the new post 
This seems to be becoming the norm in more and more corners of the internet (not yet on here thank fuck) and whilst I absolutely get the need for trigger warnings when discussing certain subjects that level just seems to be making a mockery of the whole thing!