Who think this is stupid?

I went to Hershey Park a few days ago, and the safety signs outside the rides states that one cannot hold a infant and get on the ride. Now is this not common sence who gets onto a roller coaster or any ride for that matter with a infant. Also on these signs is a notice that a law had to be made to make sure everybody follows the safety rule posted on the sign like people cannot simply abide to the rules themselves and avoid pointless laws like this.