I second this. I have legitimate triggers which I appreciate being warned about, and if I stumble across it by accident I have a violent physical reaction. Last time it happened I was vomiting, crying and all but having a complete mental breakdown. Some people may have triggers like this to simple things, but calling everything a trigger is confusing and in some cases invalidating.

I think calling it a 'content warning' is a lot more appropriate than 'trigger warning'. Severe things such as epilepsy warnings and abuse, assault, etc. can be and are triggers for many people, but I think calling it a content warning eliminates the debate about whether it's legitimate or not.

There is a huge difference between triggers and being offended by something.