Passage Summary: The rule is simple: don't pull a prank if it's mean-spirited or if someone might actually get hurt.

Reasoning: A person should refrain from playing a practical joke if it demonstrates a lack of respect for the target or if it could cause them significant harm.

Analysis: This is a 'Principle Justify' question, meaning we need to find an application that follows this rule perfectly. The rule provides two sufficient conditions for why a joke should *not* be played: contempt or potential harm. To justify an argument, we need a scenario where a joke is deemed wrong specifically because it was disrespectful or dangerous. If a prank was just 'unfunny' or 'expensive,' this principle wouldn't apply, so focus strictly on those two triggers.