The world is divided into people who are so relaxed and calm around wasps that it's unnaturally terrifying, and the people who freak out at the presence of them and just have to leave the room if they're suddenly in it. We fall into the latter group of people, and therefore find this prank to be absolutely awful and horribly mean. What if one of the people involved was unfortunate enough to have a deadly allergy to stings? Then they probably would have died of a heart attack before the prank was revealed.
At least it's not a s terrifying as this Oprah surpise.