Came across a great passage from a children's book just last week about baptism and how wrong people can get it. This is from the point of view of a child:
"I'd heard about Baptists from Jacob Henry's mother. According to her, Baptists were a strange lot. they put you in water to see how holy you were. Then they ducked you under the water three times. Didn't matter a whit you could swim or no. If you didn't come up, you got dead and your mortal soul went to Hell. But if you did come up, it was even worse. You had to be a Baptist."
Robert Newton Peck, "A Day No Pigs Would Die"
It's true we're a strange lot. But surviving baptism doesn't make you a Baptist. It's a public declaration that you have become a follower of Jesus - other denominations are available. Though, obviously, they aren't so good...