(Image credit: vadlmaster)
Not even considering a few gender reveal parties that have caused death and destruction, the entire custom is suspect. To be honest, no one outside the family cares whether your baby will be born a boy or a girl. Even inside the family, the importance of a baby's sex implies that one is preferable to the other, which can leave scars when someone's disappointment is seen in the video years later. If it's just an excuse to throw a party, there's nothing wrong with that, but there has been a tendency to make a big production out of the reveal in order to score internet points.
(Image credit: Lemongrass29)
Bored Panda has a gallery of images that reveal the cringe factor of gender reveal parties. Some mock the custom, some display truly bad taste, and some are downright disturbing. There are quite a few gender reveal cakes which are beautifully executed, yet show extreme gender stereotypes for the sake of an alliteration. See them all in this list.
Keep the crowds in suspense until you set off the smoke bomb in maternity ward lobby.