Hope there is a special place in hell for people who have cheap laughs at cost of emotional damage of others.
Just for clarity, I'm talking about adult males whose job description is essentially "jump out of planes and kill people." We're not made of quite such fragile stuff as, apparently, you are. It sounds like your life must be very difficult.
The level of well-I-never and pearl-clutching in these comments really speaks volumes about the HN commentariat.
Why don't you go to PTSD meeting for veterans and just tell them to stop being jumpy because they are not suppose to be fragile and its all in their heads.
However, if someone feels an equivalent amount of distress from having a convo with a fake person on a dating app as they would from thinking that some terrible accident happened to their kid at school, I believe they might have some larger personal problems to address first.