It's considerate to keep your feelings appropriate when in public
Paul is at a public conference when someone spills coffee on his shirt.
Paul wants to react to the coffee spill.
Paul calmly gets a napkin and dries the coffee to the best of his ability.
Paul angrily yells at the person spilling the coffee and makes a scene.
Paul goes home to change and joins more conferences later on.
Paul gets kicked out of the conference.