It's getting out of hand. Just about everything a person can say or do can be perceived as a threat or "Trigger" to someone else's emotional well-being. It's become so bad that two people getting dressed up and going out for a meal together may "trigger" negative responses from dozens of other people and cause them to have meltdowns.
(Yes, I am exaggerating, but when you read through the list of triggers below, you may begin to see my point.)
Here is a list of Emotional Triggers that I have encountered by observing and noting the responses of other people to them. Please add more of your own.
Emotional Triggers
Bragging. The mere mention of a personal achievement in a group of people is likely to trigger at least one defensive/hostile reaction.
Couples. Two people seen in public arm-in-arm or holding hands is an assault against those who have no significant other in their lives.
Cultural Clothing. Wearing a turban, dashiki, barong, hijab, or china poblana is perceived by some to be a threat to their own culture, and may provoke an anger or fear reaction.
Eye Contact. Looking at someone may trigger an aggressive response. Strangely enough, not looking at someone may trigger the same response.
Laughter. People in the depressive phase of their bipolar disorders, or who are clinically depressed may perceive other people's laughter (and smiles) as a direct assault against them.
Meat. Eating meat in public may be perceived as a direct assault against vegetarians and vegans.
Milk. Drinking whole, white milk in public is an assault against those who are not descended from European stock. Thus, drinking milk is seen as a declaration of your own "whiteness" and therefore a threat to Africans, Asians, and Middle-Easterners.
Religious Symbols. The open display of religious symbols and/or reading material is perceived as an attack against atheists and people of other religions.
Suits. Wearing a suit (or other "Office-Formalwear") is an assault against working-class people who cannot afford nice clothing. Same for wearing expensive watches, shoes and jewelry.
Whispers. Speaking softly may trigger a fear response in people who are paranoid and/or schizophrenic. Paradoxically, speaking in a loud voice may trigger the same response from the same people.
It's getting ridiculous. It's getting to the point where simply being out in public could trigger an emotional response from some fragile snowflake. Sometimes, it's just not worth going out any more.