Yes, there are some rude rubes out there, there's no denying that.
It's just that I understood long ago that such people have a bone to pick with the whole world, or with their own lives, and not with me specifically. Thus, I don't take their shenanigans personally, even though I may be the person who happens to be standing next to them when they go full feeb.
Also, twenty years worth of peaceful conflict resolution and de-escalation training kicks in almost automatically now.
But, yeah, there are individuals out there who are walking arguments for non-elective euthanasia.